Does God Exist?

There were two roommates in college, one a believer and one not. One day they were discussing the validity of God. The believer said to the non-believer, give me five good reasons why God does not exist and we will go from there. The non-believer thought for a while and finally came up with his five reasons. He said to the believer, "can you see God?"
"No," said the believer.
"Can you smell God?"
"Not really," said the believer.
"Can you touch God?"
"No," said the believer.
"What about taste?"
"No," said the believer.
"Well can you hear God?".
"Well, ya I can hear God, in the wind and stuff".
"Well," said the non-believer, "four out five, God does not exist."
The believer thought and asked for a while to think about it. Finally he came back and said to his friend, "Okay. Can you touch your brain?"

"No."
"Can you see your brain?"
"Nope."
"Can you smell your brain?"
"No."
"What about hear it?"
"I guess not," replied the non-believer.
"Then can you taste your brain?"
"No."
"Well then," said the believer, "I guess it is pretty obvious. Five out five, you have no brain."