The Days of Unleavened Bread remind us that with God's help we must remove and avoid all types of sin in all areas of our life. This is the next step in God's plan for humanity. After Passover we must keep the sin out of our lives. When God freed Isreal He said that for seven days they shall eat unleavened bread (Exodus 12:15 Exodus 12:15Seven days shall you eat unleavened bread; even the first day you shall put away leaven out of your houses: for whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
American King James Version×) and the unleavened bread was from the dough that the Israelites brought out of Egpyt with them (Exodus 12:39 Exodus 12:39And they baked unleavened cakes of the dough which they brought forth out of Egypt, for it was not leavened; because they were thrust out of Egypt, and could not tarry, neither had they prepared for themselves any victual.
American King James Version×). Since they did not have time to allow it to rise the dough was unleavened. When Jesus Christ came to earth he also kept the Feast of Unleavened Bread and explained that the first day and last day would be a holy convocation (Luke 2:41 Luke 2:41Now his parents went to Jerusalem every year at the feast of the passover.
American King James Version×; Matthew 26:17 Matthew 26:17Now the first day of the feast of unleavened bread the disciples came to Jesus, saying to him, Where will you that we prepare for you to eat the passover?
American King James Version×). We must remember that God delivers us from difficulties and from sin in our life if we repent. He did the same for the Israelites when He brought them out of Egypt (Exodus 12:14-16 Exodus 12:14-16 [14] And this day shall be to you for a memorial; and you shall keep it a feast to the LORD throughout your generations; you shall keep it a feast by an ordinance for ever. [15] Seven days shall you eat unleavened bread; even the first day you shall put away leaven out of your houses: for whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel. [16] And in the first day there shall be an holy convocation, and in the seventh day there shall be an holy convocation to you; no manner of work shall be done in them, save that which every man must eat, that only may be done of you.
American King James Version×). In the new testement Paul also likens leaven to sin and explains to Corinth that they should get rid of it in our lives (1 Corinthians 5:6-8 1 Corinthians 5:6-8 [6] Your glorying is not good. Know you not that a little leaven leavens the whole lump? [7] Purge out therefore the old leaven, that you may be a new lump, as you are unleavened. For even Christ our passover is sacrificed for us: [8] Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.
American King James Version×). We examine ourselves and take these lessons and apply them to our lives through keeping the Feast of Unleavened Bread. 

To read more about the Feast of Unleavened Bread click the links below. 

http://www.ucg.org/tags/unleavened-bread

The Feast of Unleavened Bread: Replacing Sin With the Bread of Life