We change our behavior when the pain of staying the same becomes greater than the pain of changing. Consequences give us the pain that motivates us to change.

The sky is the limit.

我们才刚刚开始触及理解我们的身体如何感知环境的表面。

"I try to never get too high or too low. It's about finding that balance."

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