If you know that you have to do it, then do it. For Abraham reaches a point where he is willing to do anything to follow the Lord. At the end, there are no conditions. Whatever God has asked for will be given, even if I don't fully understand it all. That is what faith is about.
Faith is unconditional.
Faith is truly believing and being willing to walk with the Lord no matter where that road might lead. At one level, yes. But this is the heart of what God is all about. We need to really trust him knowing that he will care for us. In the movie, Indiana Jones and the Last Crusade, there is a time when Indiana Jones is following a trail, and he comes to a point where he has to cross this huge chasm.