智慧是快乐的源泉。
Wisdom is the source of all happiness.
When given the choice between being right orbeing kind, choose kind.
La vida es una serie de colisiones con el futuro; no es una suma de lo que hemos sido, sino de lo que anhelamos ser.
可持续林业不是一种选择;它是一种义务。
Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.
生活的意义并不在于活着,而在于爱好人生。