glorying is not good. Know ye not that a little leaven
leaveneth the whole lump? Purge out therefore the old
leaven, that ye may be a new lump, as ye are unleavened.
For even Christ our passover is sacrificed for us:
Therefore 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 Corinthians 5:6-8