The blog is actually really simple, and it makes sense. The professor was disproving God because God created all, and if he created all, he created Evil, which means he cannot be completely good.

In the comparison, God is the same as light or heat. Just as the presence of light or heat makes you able to see or feel warmth, the presence of God is good. In the absence of light or heat, there is only darkness or cold. The absence or rejection of God is evil.

The whole point of the blog isn't to prove the existence of God, it is to refute the claims of the atheistic professor and also use the same type of argument to challenge the theory of evolution and the professor's intelligence.

The existence of God is purely a faith issue, and will always be a faith issue until I die and find out for sure. I personally believe in God for my own reasons.