Originally Posted by
AnthonyV 
The "God Reflex" is the tendency for humans through out history to attribute anything that couldn't be easily explained as being the result of God. For example, early man hears thunder, thinks that must be from God.
There are branches of philosophy dedicated to these kinds of limits to man’s knowledge known as epistemology, gnoseology and existentialism. Knowledge of the existence of God frequently falls into this category.