The principle of leaven is used in Scripture to symbolize that which is evil, either in doctrine or in practice. In this sermon Get Rid Of The Leaven, we see In the OT the literal leaven was a type for us. In the NT, one notes that the literal leaven of the OT points to a spiritual leaven in the NT. Three distinct types of leaven were mentioned in the earthly ministry of Jesus. When Jesus spoke of it, there was no doubt about it pointing to sinful practices, human weaknesses, and false doctrine. The principle of leaven is used in Scripture to symbolize that which is evil, either in doctrine or in practice.