The true meaning of life is to plant trees, under whose shade you do not expect to sit.
人生的真正意义在于种树,虽然你并不期待坐在树荫下。
The mind is a biological instrument for managing life's challenges.
数学中发现的快乐就像解开宇宙留给我们的谜题。
You can discover what your enemy fears most by observing the means he uses to frighten you.