The Story of Prometheus

The good titan, Prometheus, that I had mentioned before in the Coming of the Greek Gods, was asked by Zeus to create man out of clay, and teach them how to live on earth, the basics of life, and the gifts of everything. But he might not give them the gift of fire, for that belonged to the gods. Without fire, teaching mankind and mankind's life became hard and slow work. If he gave fire to mankind, he would surely be punished by Zeus. But he had to give them, to make the job faster. So before he gave fire to mankind, he asked his good brother titan Epimetheus, to take care of them when he was punished by Zeus. Finally Prometheus gave fire to mankind and was punished by Zeus.

Zeus punished Prometheus by chaining him onto a rock and everyday an eagle would come and ate his liver. But then it would grow again and the next day the eagle would eat it again. Repital. But Prometheus told Zeus that the giants would one day overthrow him, and only he (Prometheus) knew the solution. Only he won't tell until he was realeased. Zeus had no intention realeasening Prometheus, so Prometheus didn't tell Zeus. (He would be released in another Greek myth)

http://www.theoi.com/Titan/TitanPrometheus.html