The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.

I always tell my traders, 'Don't be a hero. Don't have an ego. Always question your own ability.'

The degree of slowness is directly proportional to the intensity of memory; the degree of speed is directly proportional to the intensity of forgetting.

最成功的公司是那些为真实人群解决真实问题的公司。