Moses was instructed to "make a Vail of blue, and purple, and scarlet, and fine twined linen of cunning  work: with cherubims shall it be made: And thou shalt hang it upon four pillars of shittim wood overlaid with gold: their hooks shall be of gold, upon the four sockets of silver. And thou shalt hang up the Vail under the taches, that thou mayest bring in thither within the Vail the ark of the testimony: and the Vail shall divide unto you between the holy place and the Most Holy Place (Exod.26:31-33).
A. Why divide the Holy Place from the Most Holy Place?
1. It was because God wanted to "dwell" with men again(Exod.25:8) The "Lord spake unto Moses, saying, Speak unto the children of Israel, that they bring me an offering: of every man that gives it willingly with his heart ye shall take my offering...And let them make me a sanctuary; that I may dwell among them" (Exod.25:1-9).
2. The problem was that "no man can see me (God) and live"
Moses said to God, "Show me your glory. And He said, I will make all my goodness pass before thee, and I will proclaim the name of the Lord before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy. And he said, Thou canst not see my face: for there shall no man see me, and live" (Exod.33:18-20).
3. Therefore the Vail was incorporated into the Tabernacle
Moses was instructed to "make a Vail of blue, and purple, and scarlet, and fine twined linen of cunning  work: with cherubim's shall it be made: And thou shalt hang it upon four pillars of shittim wood overlaid with gold: their hooks shall be of gold, upon the four sockets of silver. And thou shalt hang up the Vail under the taches...the Vail shall divide unto you between the holy place and the Most Holy Place (Exod.26:31-33).
4. This division began when "sin entered into the world" (Rom.5:10-14)
Adam and Eve were driven out by the presence of the Lord and kept out by the flaming sword. "So the Lord drove them out of the garden" (Gen.3:24) and two cherubim's were placed at the east gate and a flaming sword to prevent them from re-entry the garden and from God's presence.
a. God began immediately to reveal the blueprintfor redemption God told Adam and Eve that the "seed of the woman" would crush the serpents head and He would make a way to redeem mankind back to Himself (Gen.3:15; 4:25; 9:9; 12:7; 13:15- 16; 15:1-18; 17:1-19, 21:1-18, [John.8:56, Heb.2:6] Gen.26:1-4; 28:1-14, 2Tim.2:8, Rom.9:1-5 [v.5], Gal.3:1-29, Rom.16:20, 1Cor.15:25).
b. He began by drawing  the blueprint with "Coats of skins"
Adam and Eve's solution (i.e. man's wisdom Col.2:8) was "fig leaves" (Gen.3:7). God's answer was the death and shedding of innocent animal blood to cover their nakedness / sin (Gen.3:21-24). (Review: PHASE 2 for details of chart below)
c. This blueprint continued developing through Abel
In "the process of time" Abel brought the firstlings (lamb) of his flock because he knew not to bring "fig leaves." (i.e. philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ" (Col 2:8). He knew to bring the shedding of innocent blood of a lamb because of the testimony of Adam and Eve (Heb.11:4, Rom.10:17). This was confirmed and approved by God because He had respect unto Abel's offering and not Cain's (Gen.4:1-4).
Note: Ever since this time man's conscience (John.8:9, Rom.2:15, 2Cor.4:2, Titus.1:15, Heb.9:9; 10:22) has been telling him that he needs the shedding of atoning blood to be redeemed. This is evident by all the animal sacrificing that is included in cultures and religions down through the ages.
d. The blueprint continued to be "sketched  out" through Noah
Then Noah offered clean animals in sacrifice upon an altar(Gen.8:20-24). God gave His approval when He smelled the savor of the offering because it was foreshadowing Christ (Eph.5:1-2), who was to bring us back into God's presence once again. e. The blueprint continued through Abram (Abraham)
The "Lord appeared unto Abram, (Abraham) (Gen.17:5) and said, Unto thy seed will I give this land: and there builded he an altar unto the Lord, who appeared unto him. And he removed from thence unto a mountain on the east of Bethel, and pitched his tent, having Bethel on the west, and Hai on the east: and there he builded an altar unto the Lord, and called upon the name of the Lord." This understanding continued from Abraham, to Isaac, to Jacob (Israel), to the twelve sons of Israel, to them going down into 400 years of bondage in Egypt, to their deliverance from Egypt by way of the Passover Lamb and eventually arriving at Mt. Sinai.
f. Then the blueprint was expanded through Moses
"The Lord spake unto Moses, saying, Speak unto the children of Israel, that they bring me
an offering: of every man that giveth it willingly with his heart ye shall take my offering
...And "let them make me a Sanctuary; that I may dwell among them."
God now wants a closer walkwith man who He had created in His image for His
pleasure. This required a Vail to divide God's presence from sinful flesh
(Exod.25:1-2,8; 26:31-35). This wasbecause "the way into the holiest of all (i.e. the Most
Holy Place, where God's presence dwelt) was not yet made manifest, while as the
first tabernacle was yet standing: Which was a figure for the time then present"
The "priests (i.e. the priesthood / sons of Aaron) went always into the first tabernacle, (Holy Place) accomplishing the service of God (Exod.28:1-43, Num.1:47-54). But into the second went the high priest alone (through the Vail,Lev.16:1-34) once every year, not without blood, which he offered for himself, and for the errors of the people" (Heb.9:6-7). No one else was permitted in God's presence. This was God's blueprint / sketchy outline to bring man back into fellowship with Him. 1. It was the "High Priest alone" that could enter (No one else Heb.9:6-7)
"But into the second (i.e. the Most Holy Place where God's presence was) went the high priest alone (Heb.9:6-7). The "Lord spake unto Moses after the death of the two sons of Aaron, when they offered before the Lord, and died; (Lev.10:1-2)...Speak unto Aaron thy brother, that he come not at all times into the holy place within the vail before the mercy seat, which is upon the ark; that he die not: for I will appear in the cloud upon the mercy seat. Thus shall Aaron come into the holy place" (Lev 16:1-3).
a. The requirements for the High Priest before entering within the Vail alone (1) To be appointed by God
For "every high priest taken from among men is ordained for men in things pertaining to God, that he may offer both gifts and sacrifices for sins...And no man taketh this honour unto himself, but he that is called of God, as was Aaron" (Heb.5:1-4).
(2) No Blemishes Whosoever "he be of thy seed (i.e. the seed of Aaron the High Priest) in their generations that hath any blemish, let him not approach to offer the bread of his God" (Lev.21:17-24).
(3) Laws for Marriage
He "that is the high priest among his brethren, upon whose head the anointing oil was poured, and that is consecrated to put on the garments, shall not uncover his head, nor rend his clothes;..he shall take a wife in her virginity. A widow, or a divorced woman, or profane, or an harlot, these shall he not take: but he shall take a virgin of his own people to wife" (Lev 21:10-15).
(4) Garments to wear
These "are the garments which they shall make; a breastplate, and an ephod, and a robe, and a broi- dered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest's office" (Exod.28:4).
2. Once a year, not without blood
God's Redemptive plan began with the shedding of blood to cover Adam and Eve's sin (Gen.3:1-14, Heb.4:12-13), and now it is incorporated into the office of the High Priest (Heb.9:6-7, Lev.16:1-34).
3. Offered for himself, and for the errors of the people(Heb.9:6-7)
Aaron (the High Priest) shall offer his bullock of the sin offering, which is for himself, and make an atonement for himself, and for his house" (Lev.16:6).Then shall he kill the goat of the sinoffering, that is for the people, and bring his blood within the vail, and do with that blood as he did with the blood of the bullock, and sprinkle it upon the mercy seat, and before the mercy seat: And he shall make an atonement for the holy place, because of the unclean -ness of the children of Israel, and because of their transgressions in all their sins: and so shall he do for the tabernacle of the congregation, that remaineth among them in the midst of their uncleanness. And there shall be no man in the tabernacle" (Lev 16:15-17).