The Bible tells us that proof of God’s existence can clearly be seen in nature. Through His creation, God reveals enough about Himself to inspire and motivate our pursuit of Him. Consequently, He has stripped mankind of any excuse for failing to do so.(Romans 1:19-20) But if that were not enough—which apparently is the case for many—God has provided further proof of His existence.

In his book, Mere Christianity, C.S. Lewis talks about a law, or principle, which is fundamental to our common experience. He claims that all people down through history have instinctively known that a moral law exists by which they ought to behave. It is called the Law of Nature (or Human Nature). He goes on to say that two points are essential to our understanding of how this law operates:

“First, that human beings, all over the earth, have this curious idea that they ought to behave in a certain way, and cannot really get rid of it. Secondly, that they do not in fact behave in that way. They know the Law of Nature; they break it. These two facts are the foundation of all clear thinking about ourselves and the universe we live in.”