The bible says that “the fool says in his heart that there is no God”.
I personally believe that the evidence for the existence of God is all around us – in nature, in the laws of physics, in the amazing nature of our bodies. In all of creation, as it say in Romans, the “evidence is clearly seen, by the things which are made.”
But its also interesting that we all operate in our daily lives by a “built in” sense of what is right, and what is wrong;and what is good vs. bad. Where do we get this sense of judgement? Theoretically, if there is not God, there is no ultimate objective standard for judging what is right, and what is wrong. Only subjective judgments are possible – what is “right” to you, may be “wrong” to me. But without an objective moral standard, both in a sense are acceptable. – so we shouldn’t make judgments.
Yet we don’t behave this way, so we? If though he believes no God exists, the atheist becomes outraged when someone commits some horrible crime. But why? Perhaps the criminal thought the act proper. To the criminal, it was fair – and indeed this is the way the act should be viewed, if there is no objective standard for judging right and wrong.
But we “know” that certain things are right, and others are clearly “wrong”. We all have a conscience which tells us this intuitively.
The Moral Argument is a powerful argument for God’s existence. Here is a goof short video from Dr. Craig on the Moral Argument for the existence of God: