The word that seems to come to mind is survival. When I consider the things that Abraham was asked to do I don't think he would have even been able to get through the day without calling on God. I know I can't , and I'm just living a relitively nomal life. The thought of leaving home to settle in another country is scarry enough now. Abraham didn't have years of stories and generations of people who had done the same thing to look back on. He truly was stepping out with nothing but God. He had to be wondering if he was crazy and just hearing voices half the time. I think he called on God to remind himself that he wasn't crazy, that God was and is real, and that eventually everything would work out the way that God intended it to.