You can never plan the future by the past.
［译］永远也不能依照过去来计划将来。
You may know the horse by his harness.
［译］欲知马如何，可看套马索。
Youth and age will never agree.
［译］老少难相投。
Youth is a blunder; manhood a struggle; old age a regret.
［注解］出自美国文艺评论家门肯。
［译］青年鲁莽犯错，中年努力拼搏，老年后悔已过。
Youth is more courageous than age because it knows less. Age is wiser than youth because it knows more.
［译］青年人比老年人勇气大，因为他们知道的比较少。老年人比青年人明智，因为他们知道的较多。