Glimpses of Grace; Abraham

Reading through the book of Genesis, I found Abraham showing great faith in chapter 12 when he up and departed to a land God would later show him. But in chapter 13 Abraham shows a great lack of faith when he lies to Pharoah about Sarai. What I found out about God is that he rewarded Abraham when he exercised faith, and was merciful to him when he had a lack of faith. I have found in my own life, a God who is merciful when I am less than I should be.