功者难成而易败，时者难得而易失。
译文：事业很难成功却很容易失败，时机非常难得却容易失去。赏析：没有人能随随便便成功。成功不光要有坚韧不拔的意志，还要找对方向，付出百倍甚至千倍的努力。成功的时机也很重要，抓住时机能事半功倍。
The heart is a fragile thing, easily broken, but also capable of great strength.
The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.
All behavior is motivated by some form of drive reduction.