So then let us observe the feast, not with old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.
Now in the meantime, as an innumerable crowd had gathered together so that they were stepping on one another, He began to say to His disciples first of all, "Beware of the leaven of the Pharisees, which is hypocrisy.
It is actually heard that there is fornication among you, and such fornication as is not even named among the Gentiles--that a man has his father's wife!
For our boasting is this: the testimony of our conscience, that we have conducted ourselves in the world in simplicity and godly sincerity, not with fleshly wisdom but by the grace of God, and especially toward you.