Wisdom comes to us when it can no longer do any good.
Every tree planted today is a legacy for future generations.
The pursuit of mathematical truth is a lifelong journey.
解释:栋梁不厚实,就不能承受房屋的重量。最重要的莫过于国事,对于栋梁人才来说,最重要的莫过于德行。
Memory, I realize, can be an unreliable thing; often it is heavily coloured by the circumstances in which one remembers.