I believe the Day of Atonement is the experience that is needed for the perfection of the saints. During this fall feast, where will be a time when type meets reality, the people of God will finally have the victory over sin once and for all.
1 Chronicles 29:11 Thine, O LORD is the greatness, and the power, and the glory, and the victory, and the majesty: for all that is in the heaven and in the earth is thine; thine is the kingdom, O LORD, and thou art exalted as head above all
Psalm 98:1 O sing unto the LORD a new song; for he hath done marvellous things: his right hand, and his holy arm, hath gotten him the victory.
Remember the wages of sin is death.
Isaiah 25:8 He will swallow up death in victory; and the Lord GOD will wipe away tears from off all faces; and the rebuke of his people shall he take away from off all the earth: for the LORD hath spoken it.
1 Corinthians 15:54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
We finally reach the point where we are incorruptible.
1 Corinthians 15:57 But thanks be to God, which giveth us the victory through our Lord Jesus Christ
1 John 5:4 For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith.
Revelation 15:2 And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.3 And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous are thy works, Lord God Almighty; just and true are thy ways, thou King of saints. 4 Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy: for all nations shall come and worship before thee; for thy judgments are made manifest. 5 And after that I looked, and, behold, the temple of the tabernacle of the testimony in heaven was opened:
The Day of Atonement is the coming to His temple and the Feast of Tabernacles is the second coming.
The SEVENTH aspect of the Levitical convocations is the feast of TABERNACLES. Tabernacles represents the fullness of the indwelling of God in us. It is God's purpose to DWELL (Tabernacle) AMONG THE PEOPLE OF THE EARTH. God is BUILDING HIS CHURCH, THE BODY OF CHRIST, FOR THAT VERY REASON - that He might have a dwelling place in which and through which He can abide among the nations of the earth.
Then the church which our Lord at His coming is to receive to Himself will be a "glorious church, not having spot, or wrinkle, or any such thing." Ephesians 5:27. Then she will look "forth as the morning, fair as the moon, clear as the sun, and terrible as an army with banners." Song of Solomon 6:10.
If you are not ready to meet the Almighty, Awesome, Holy God and you approach the Lord or the Lord approaches you, the sin within you will burn within you because holiness and sin can not co-exist in the same space. You will start to tremble and fear will start to overwhelm you. Does God want this for His people? No, that is why He is trying to prepare you for his Almightiness, Power and Glory. Poor Isaiah found himself in the presence of God, he said woe is me for I am unclean. So even if you have just gone through the book of your life with Yeshua, and have reached to point of having the peace that passes all understanding, you will still be unprepared for the reality of the Almighty Pure Glory of God. Yet if we are to live with him forever, do you not think that now is the time to prepare? Study the word of God looking for God, what is he really like, what does God think, what did those that met with God think, how did they describe their experience. Get a feel for what it would be like to have the real experience. God will guide you through his word, He will show you were you are lacking, and He will open your eyes so that you may see your true self. He will prepare you if you but let Him who has begun a good work finish it. Pray that you may have the courage it takes to go all the way with Yeshua.
"Go thy way, Daniel: for the words are closed up, and sealed till the time of the end." Daniel 12:9 I believe we are reaching the time of the end or last days of earth's history.