Overall Question: What were the distinct roles of the priests and the Levites? How was each group provided for?

Memory Text: Numbers 18:20 KJV “And the LORD spake unto Aaron, … I [am] thy part and thine inheritance among the children of Israel.”

Sunday – Division of Labor
Exodus 19:5-6 CEV “5 Now if you will faithfully obey me, you will be my very own people. The whole world is mine, 6 but you will be my holy nation and serve me as priests. Moses, that is what you must tell the Israelites.”
1 Peter 2:9 CEV “But you are God’s chosen and special people. You are a group of royal priests and a holy nation. God has brought you out of darkness into his marvelous light. Now you must tell all the wonderful things that he has done. The Scriptures say,”
Revelation 14:6-12 KJV “6 ¶ And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people, 7 Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters. 8 And there followed another angel, saying, Babylon is fallen, is fallen, that great city, because she made all nations drink of the wine of the wrath of her fornication. 9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive [his] mark in his forehead, or in his hand, 10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb: 11 And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name. 12 Here is the patience of the saints: here [are] they that keep the commandments of God, and the faith of Jesus.”
Numbers 18:1-7 God’s Word to the Nations “1 ¶ The LORD said to Aaron, "You, your sons, and your family will be responsible for any sins against the holy place. You and your sons will also be responsible for any sins you commit when you work as priests. 2 Bring the other Levites from your ancestor’s tribe to join you and help you and your sons serve in front of the tent of the words of my promise. 3 They will work for you, doing whatever work is necessary for the whole tent. But they must not come near the altar or the furnishings in the holy place, or they will die, and you will die, too. 4 They will join you and do whatever work is necessary for the tent of meeting, including all the maintenance work for the tent. But no one else may come near you. 5 "You must be in charge of the work done at the holy place and at the altar. Then I won’t show my anger against the Israelites again. 6 I have chosen the other Levites from among the Israelites to help you. They are a gift given to the LORD to do whatever work is necessary at the tent of meeting. 7 Only you and your sons may do the work of priests––everything done at the altar and under the canopy. This is my gift to you: You may serve me as priests. Anyone else who comes near the holy place to do this work must die."”

Monday – The Gifts of Divine Service
Numbers 18:1-7 – see above.

Tuesday – Sanctuary Support
Numbers 18:8-20 English Standard Version “8 ¶ Then the LORD spoke to Aaron, "Behold, I have given you charge of the contributions made to me, all the consecrated things of the people of Israel. I have given them to you as a portion and to your sons as a perpetual due. 9 This shall be yours of the most holy things, reserved from the fire: every offering of theirs, every grain offering of theirs and every sin offering of theirs and every guilt offering of theirs, which they render to me, shall be most holy to you and to your sons. 10 In a most holy place shall you eat it. Every male may eat it; it is holy to you. 11 This also is yours: the contribution of their gift, all the wave offerings of the people of Israel. I have given them to you, and to your sons and daughters with you, as a perpetual due. Everyone who is clean in your house may eat it. 12 All the best of the oil and all the best of the wine and of the grain, the firstfruits of what they give to the LORD, I give to you. 13 The first ripe fruits of all that is in their land, which they bring to the LORD, shall be yours. Everyone who is clean in your house may eat it. 14 Every devoted thing in Israel shall be yours. 15 Everything that opens the womb of all flesh, whether man or beast, which they offer to the LORD, shall be yours. Nevertheless, the firstborn of man you shall redeem, and the firstborn of unclean animals you shall redeem. 16 And their redemption price (at a month old you shall redeem them) you shall fix at five shekels in silver, according to the shekel of the sanctuary, which is twenty gerahs. 17 But the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat, you shall not redeem; they are holy. You shall sprinkle their blood on the altar and shall burn their fat as a food offering, with a pleasing aroma to the LORD. 18 But their flesh shall be yours, as the breast that is waved and as the right thigh are yours. 19 All the holy contributions that the people of Israel present to the LORD I give to you, and to your sons and daughters with you, as a perpetual due. It is a covenant of salt forever before the LORD for you and for your offspring with you." 20 ¶ And the LORD said to Aaron, "You shall have no inheritance in their land, neither shall you have any portion among them. I am your portion and your inheritance among the people of Israel.”
Numbers 18:5 SDA BIBLE COMMENTARY The Levites were responsible outside the tabernacle, as the priests were within. The priests were to care for all the holy things, such as the shewbread (the bread of the Presence), the lamps, etc., and to cover them when they were to be moved. The Levites were to see that members of the congregation did not inadvertently or impiously profane the sanctuary.
Numbers 18:6 SDA BIBLE COMMENTARY The Levites were not to seek the office of the priesthood, as Korah had done, but to assist the priests in the ministry of the Lord. But the priests were not to look down upon them, but always bear in mind that they were to be regarded and treated as “brethren.”

Wednesday – The Tithing Plan
Numbers 18:21-32 Holman Christian Standard Bible “21 “Look, I have given the Levites every tenth in Israel as an inheritance in return for the work they do, the work of the tent of meeting. 22 The Israelites must never again come near the tent of meeting, or they will incur guilt and die. 23 The Levites will do the work of the tent of meeting, and they will bear the consequences of their sin. The Levites will not receive an inheritance among the Israelites; this is a perpetual statute throughout your generations. 24 For I have given them the tenth that the Israelites present to the LORD as a contribution for their inheritance. That is why I told them that they would not receive an inheritance among the Israelites.” 25 The LORD instructed Moses, 26 “Speak to the Levites and tell them: When you receive from the Israelites the tenth that I have given you as your inheritance, you must present part of it as an offering to the LORD—a tenth of the tenth. 27 Your offering will be credited to you as if it were your grain from the threshing floor or the full harvest from the winepress. 28 You are to present an offering to the LORD from every tenth you receive from the Israelites. Give some of it to Aaron the priest as an offering to the LORD. 29 You must present the entire offering due the LORD from all your gifts. The best part of the tenth is to be consecrated. 30 “Tell them further: Once you have presented the best part of the tenth, and it is credited to you Levites as the produce of the threshing floor or the winepress, 31 then you and your household may eat it anywhere. It is your wage in return for your work at the tent of meeting. 32 You will not incur guilt because of it once you have presented the best part of it, but you must not defile the Israelites’ holy offerings, so that you will not die.””
Numbers 18:28 SDA BIBLE COMMENTARY Non-Levites were much more numerous than the Levites, nearly 30 to 1. This meant that the Levites were well provided for indeed. It was therefore fitting that as the Levites received tithes from the people, they in turn should pay tithes to the priests.

Thursday – The Red Heifer
Numbers 19 New Living Translation “1 ¶ The LORD said to Moses and Aaron, 2 "Here is another ritual law required by the LORD: Tell the people of Israel to bring you a red heifer that has no physical defects and has never been yoked to a plow. 3 Give it to Eleazar the priest, and it will be taken outside the camp and slaughtered in his presence. 4 Eleazar will take some of its blood on his finger and sprinkle it seven times toward the front of the Tabernacle. 5 As Eleazar watches, the heifer must be burned—its hide, meat, blood, and dung. 6 Eleazar the priest must then take cedarwood, a hyssop branch, and scarlet thread and throw them into the fire where the heifer is burning. 7 "Then the priest must wash his clothes and bathe himself in water. Afterward he may return to the camp, though he will remain ceremonially unclean until evening. 8 The man who burns the animal must also wash his clothes and bathe in water, and he, too, will remain unclean until evening. 9 Then someone who is ceremonially clean will gather up the ashes of the heifer and place them in a purified place outside the camp. They will be kept there for the people of Israel to use in the water for the purification ceremony. This ceremony is performed for the removal of sin. 10 The man who gathers up the ashes of the heifer must also wash his clothes, and he will remain ceremonially unclean until evening. This is a permanent law for the people of Israel and any foreigners who live among them. 11 ¶ "All those who touch a dead human body will be ceremonially unclean for seven days. 12 They must purify themselves on the third and seventh days with the water of purification; then they will be purified. But if they do not do this on the third and seventh days, they will continue to be unclean even after the seventh day. 13 All those who touch a dead body and do not purify themselves in the proper way defile the LORD’s Tabernacle and will be cut off from the community of Israel. Since the water of purification was not sprinkled on them, their defilement continues. 14 "This is the ritual law that applies when someone dies in a tent: Those who enter that tent, and those who were inside when the death occurred, will be ceremonially unclean for seven days. 15 Any container in the tent that was not covered with a lid is also defiled. 16 And if someone outdoors touches the corpse of someone who was killed with a sword or who died a natural death, or if someone touches a human bone or a grave, that person will be unclean for seven days. 17 "To remove the defilement, put some of the ashes from the burnt purification offering in a jar and pour fresh water over them. 18 Then someone who is ceremonially clean must take a hyssop branch and dip it into the water. That person must sprinkle the water on the tent, on all the furnishings in the tent, and on anyone who was in the tent, or anyone who has touched a human bone, or has touched a person who was killed or who died naturally, or has touched a grave. 19 On the third and seventh days the ceremonially clean person must sprinkle the water on those who are unclean. Then on the seventh day the people being cleansed must wash their clothes and bathe themselves, and that evening they will be cleansed of their defilement. 20 "But those who become defiled and do not purify themselves will be cut off from the community, for they have defiled the sanctuary of the LORD. Since the water of purification has not been sprinkled on them, they remain defiled. 21 This is a permanent law. Those who sprinkle the water of purification must afterward wash their clothes, and anyone who touches the water of purification will remain defiled until evening. 22 Anything and anyone that a defiled person touches will be ceremonially defiled until evening."”
Numbers 19:1 COMMENTARY BY MATTHEW HENRY This chapter is only concerning the preparing and using of the ashes which were to impregnate the water of purification. The people had complained of the strictness of the law, which forbade their near approach to the tabernacle, Nu 17:13. In answer to this complaint, they are here directed to purify themselves, so as that they might come as far as they had occasion without fear.
Numbers 19:6 SDA BIBLE COMMENTARY Both cedar and hyssop were credited by the ancients with various medicinal properties. The scarlet thread matched the color of the heifer. Cedar wood was regarded as an emblem of fragrance and incorruption, the hyssop as a symbol of purification. Scarlet was a symbol of sin (Isa. 1:18). In all three there was a typical reference to the shedding of the blood of Christ (see Heb. 9:13, 14).

Thursday's Lesson Study Guide has the following paragraph:

After slaying the heifer, the priest, clothed in pure white garments,
took the blood in his hands as it issued from the body of the victim,
and cast it toward the tabernacle seven times. Thus, Christ in His own
spotless righteousness, after shedding His precious blood, entered into
the heavenly sanctuary to minister in the sinner’s behalf. And there His
blood is brought into the service of reconciling God to humanity (see
Heb. 10:21–23).

What are you thoughts regarding Jesus blood "reconciling God to humanity"?

This is totally opposite of how I see it... I thought Jesus was reconciling us to God.

I suspect it's a typo . It demonstrates that not all Adventists are perfect.

But then someone may come by with a better explanation. Who knows.