BE ON YOUR GUARD AGAINST THE YEAST
Matthew 16:6 “Be careful,” Jesus said to them. Be on your guard against the yeast of the Pharisees and Sadducees.”
Yeast is a leavening agent like baking powder to mix in dough to make it rise. It only takes a teaspoon of yeast to double a loaf of bread.
In the Bible yeast is a symbol of evil. That yeast, a little corruption, like false teaching, can influence a large group of people and even lead them away from God and His Word.
Be on your guard.