Read Psalms 53:1  This is an interesting verse, but a hard verse.  Name calling is not good.  We should not call people names like stupid or dumb.  But one of the worst names to call someone is to call them a fool.  A fool is not just someone who is not very smart, a fool is someone who will not listen to someone else.  A fool is someone who thinks that they know everything.  But we should listen to other people and learn from them.  God gave us two ears and only one mouth.  Do you know why?  Because we should listen twice as much as we talk!  You never learn anything by talking; you only learn by listening.  Think about that!  But the most foolish thing is to say that there is no God.  Just because we can't see God does not mean that he is not there.  God is a Spirit and we cannot see Him; but He is still very real.  Only a fool says that there is no God.  I don't want to be a fool; do you?  I believe in God; do you?