 That when you allow a little bit of yeast, and by the way, leaven or yeast in the scripture is always kind of a statement that refers to sin. So when you see that word leaven in scripture, when you see the word yeast in some of your translations in the scripture, what it's talking about is sin. And it says, don't you know that a little bit of sin destroys the whole body? Now think about that in the context of the church.