“Your boasting is not a good thing. Do you not know that a little yeast leavens the whole batch of dough? Clean out the old yeast so that you may be a new batch, as you really are unleavened. For our paschal lamb, Christ, has been sacrificed. Therefore, let us celebrate the festival, not with the old yeast, the yeast of malice and evil, but with the unleavened bread of sincerity and truth.” 1 Corinthians 5:6-8