I have noticed that youngsters given to the climbing habit usually do something when they grow up.

人生是由小小的幸福积累而成的。

未来是由过去的积累构成的。

What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.

释义：开始时做得好的人确实很多，但能够坚持到底的人却很少。这句话揭示了人们在做事过程中往往容易虎头蛇尾，难以善始善终。