Do every duty, and expect no reward for it.

幸福是一种内在的工作。

The biggest enemy of art is the absence of limitations.

唯一比思想的力量更伟大的是心灵的勇气。

边界是地球脸上的伤疤，是暴力和分裂的标记。

教育的根是苦的，但果实是甜的。

We don't stop playing because we grow old; we grow old because we stop playing.