守口如瓶,防意如城。宁可人负我,切莫我负人。再三须慎意,第一莫欺心。虎身犹可近,人毒不堪亲。来说是非者,便是是非人。
【译文】要像瓶口那样不轻易开口,要像城防那样时时戒备。宁愿让别人辜负我,决不让自己辜负别人。做事要三思而后行,首先不要违背自己的良心。活着的老虎尚可以靠近,心地恶毒的人千万不能亲近。在你跟前说别人坏话的人,就是制造是非的小人。
"Trust is the foundation of any successful organization, and it must be earned every day."
Logical consequences are the scarecrows of fools and the beacons of wise men.  
The best investment is in the tools of one’s own trade.