Does evil exist?

Does evil exist?
The university professor challenged his students with this question.
Did God create everything that exists?
A student bravely replied, "Yes, He did!"
"God created everything?" the professor asked.
"Yes, Sir," the student replied.
The professor answered, "If God created everything, then He also created
evil since evil exists, and according to the principle that our works
define who we are, then God is evil."
The student became quiet before such an answer.
The professor was quite pleased with himself and boasted to the students
that he had proven once more that the Christian faith was a myth.
Another student raised his hand and said, "Can I ask you a question,
professor?"
"Of course," replied the professor.
The student stood up and asked, "Professor, does cold exist?"
"What kind of question is this? Of course it exists. Have you never
been cold?" remarked the professor.
The young man replied, "In fact sir, cold does not exist. According to
the law of physics what we consider cold is in reality the absence of heat.
Everybody or object is susceptible to study when it has or transmits
energy, and heat is what makes a body or matter transmit energy.
Absolute zero (-460 degrees F) is the total absence of heat; all matter
becomes inert and incapable of reaction at that temperature. Cold does
not exist. We have created this word to describe how we feel if we have no
heat.
The student continued. "Professor, does darkness exist?"
The professor responded, "Of course it does!"
The student replied, "Once again you are wrong sir, darkness does not
exist either. Darkness is in reality the absence of light. Light we can
study, but not darkness. In fact, we can use Newton's prism to break white
light into many colors and study the various wavelengths of each color. You
cannot measure darkness. A simple ray of light can break into a world of
darkness and illuminate it. 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 young man asked the professor, "Sir, does evil exist?"
Now uncertain, the professor responded, "Of course as I have already
said. We see it every day. It is in the daily examples 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!"
To this the student replied, "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
exists 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."
The professor sat down.
The young man's name - - - - - - - - - Albert Einstein