The professor then asked, "If God created everything, then he created evil. Since evil exists (as noticed by our own actions), so God is evil." The student couldn't respond to that statement causing the professor to conclude that he had "proved" that "belief in a benevolent God" was a fairy tale, and therefore worthless.
Another student raised his hand and asked the professor, "May I pose a question?" "Of course," answered the professor. The young student stood up and asked : "Professor does cold exist?" The professor answered, "What kind of question is that? Of course cold exists... have you never been cold?"
The young student answered, "In fact sir, cold does not exist. According to the laws of physics, what we consider cold is in reality the absence of heat. Absolute Zero is the total absence of heat, but cold does not exist as such. What we have done is create a term to describe how we feel if we don't have body heat or we are not hot."
"And, does darkness exist?", he continued. The professor answered, "Of course." This time the student responded, "Again you're wrong, Sir. Darkness is, in reality, the absence of light. We can study light, but not darkness. How can you know how dark a certain space is? You measure the amount of light present. Isn't this correct? Darkness is a term used by man to describe what happens when there is no light present."
Finally, the student asked the professor, "Sir, does evil exist?" Now uncertain, the professor responded, "Of course, as I have already said. We see it everyday. It is in the daily example of man's inhumanity to man. It is in the multitude of crime and violence everywhere in the world. These manifestations are nothing else but evil."
The student responded, "Evil does not exist, Sir, or at least it does not exist unto itself. Evil is simply the absence of God. It is just like darkness and cold - a word that man has created to describe the absence of God. God did not create evil. Evil is not like faith, or love, that exist just as does light and heat. Evil is the result of what happens when man does not have God's love present in his heart. It's like the cold that comes when there is no heat, or the darkness that comes when there is no light."