Ten years had gone by since God first gave his promise to Abraham that he would be a great nation and have descendants and offspring. Still no sign of a child. What already seemed like a nearly improbably was becoming impossible. He was 85 years old and his wife was 75. How is it that what God told him wouldn't happen? He is defeated, discouraged and possibly in depression. That's when God has to remind Abraham of how big He is and how great He is. He takes him outside of his tent and tells him to look up - Gaze upon the stars. Look at what you can't explain and can't define. When he looked at something greater than what He wanted God to do - his faith grew.