The only limits that exist are the ones in your mind.

志存高远，脚踏实地，立即行动。

Nature is written in mathematical language.

 当立法和行政权力集中在同一人或同一机构时，就不会有自由。

"In tennis, like in life, you have to keep moving forward—one point at a time."

谁若不能独立,谁就谈不上自由。