I've never been a person that has been like, 'I want to be a role model.' But then you realize you are, and you have to be careful with what you say and do.

临终前与诸同志谈话，1925年3月11日

盈利和责任必须齐头并进。

Don't worry about failures, worry about the chances you miss when you don't even try.

Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.