The time of life is limited and unchangeable, so it is necessary to use every minute efficiently. Not using it well is a waste.
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
最好的解决方案往往是最简单的。
I have noticed that youngsters given to the climbing habit usually do something when they grow up.
The beauty of mathematics lies in its ability to describe the universe in a language that is both precise and universal.