Quote Originally Posted by Sid Meir's Alpha Centauri
What do I care for your suffering? Pain, even agony, is no more than information before the senses, data fed to the computer of the mind. The lesson is simple: you have received the information, now act on it. Take control of the input and you shall become master of the output.

Chairman Sheng-ji Yang, "Essays on Mind and Matter"
Accompanies the Secret Project "The Virtual World"
Now, that would be a very disturbing thing for someone else to quote at you, but I've always found it a useful mantra to help me ignore the pain from injuries,or push through the pain barrier when exercising. I don't know how useful it would be for chronic pain though.