路逢险处须回避，事到头来不自由。
【译文】走路遇到危险处尚能回避一下，麻烦事临到头上就由不得自己了。
The only limit to our realization of tomorrow will be our doubts of today.
Positive psychology is as concerned with strength as with weakness, as interested in building the best things in life as in repairing the worst.
"The future is not something we enter. The future is something we create."
数学的美在于它揭示隐藏的对称性和真理的能力。