Your boasting is not good. Do you not know that a little leaven leavens the whole lump?

Cleanse away the old leaven, in order that you may be a new lump, as you are free from leaven; for Christ has truly become our Passover.

So let us feast, not on the old leaven, nor on the leaven of sin and iniquity, but on the unleavened bread of purity and truth.