Leaven and Sin

What is leaven? What, according to the Bible, is sin? Did Jesus indicate that leaven was like sin? What are some of the similarities between leaven and sin? Are the Days of Unleavened Bread just some practice of the ancient Hebrews or were they also enjoined upon God's people in the New Testament? Did early Christians keep the Days of Unleavened Bread? Should you avoid leaven and eat unleavened bread on each of the seven days of unleavened bread? What can you do to help put sin out of your life? A written article of related interest is titled "Should Christians Keep the Days of Unleavened Bread?" URL: http://www.cogwriter.com/unleaven.htm