Let's start with a picture. A picture is word 1,000 words.
In the institution of the Passover, the Israelites were to appply the blood of the lamb on the doorpost such that the destroying angel of judgment would PASS OVER that household.
Let D.M. Panton help us here:
[my bolding, my occasional spacing]
The Blood and the Leaven
An Old Testament type, of exquisite clearness and beauty, now reveals God's dual truth on the very threshold of all Redemption.
... in the Blood and Leaven, three explicit clues are given by the Holy Spirit., so as to put all beyond doubt. "Our passover also hath been sacrificed, even Christ" - [b]therefore the lamb's blood typifies Christ's blood : [b]"wherefore let us keep the feast" - therefore the Church age, the Seven Days between Advent and Advent, is the antitype of [b]the Feast of Unleavened Bread.
Panton is saying Paul's word that Christ our Passover is sacrificed for us PLUS and the keeping of the seven say Feast of Unleavened Bread means -
1.) We are redeemed by Christ's atoning blood.
2.) We are to ENJOY Christ throughout the church age MINUS the LEAVEN, which stands for corruption and sin. A seven day Feast of Unleavened Bread following the application of the redeeming blood of the lamb is God's intention.
Here is Paul's word to which D.M. Panton is elaborationg on:
First Corinthians 5:7
English Standard Version
Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed.
Berean Study Bible
Get rid of the old leaven, that you may be a new unleavened batch, as you really are. For Christ, our Passover lamb, has been sacrificed.
...[ Let us keep the feast ] ... " not with old leaven, neither with the leaven of malice and wickedness"
"but with the unleavened bread of sincerity and truth" (1 Cor. 5:8)
First in the typology - apply the redeeming blood upon the house.
[b]"They shall taeke of the blood, and put it upon the house on the two side posts and on the lintel, upon the houses wherein they shall eat" the lamb (Exodus xii. 7). The Destroying Angel sought put every house, for every house held sinners, but lowered his sword, and passed, wherever he saw the blood.
Cont. below
WAKE UP!! This is good stuff !!