Man is free at the moment he wishes to be.

煤炭研究和DNA工作同样重要。

"The serve is the most important shot in tennis."

It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change.  

The art of competing, I’d learned from track, was the art of forgetting, and I now reminded myself of that fact. You must forget your limits. You must forget your doubts, your pain, your past.