出自先秦《荀子·解蔽》。大凡是人，往往都有惑于枝节问题而看不清大局的毛病。说明人性的弱点：看问题不全面，往往惑于表面现象，结果“只见树木，不见森林”，“捡了芝麻，丢了西瓜”。
The true power of mathematics is not in its complexity, but in its simplicity and elegance.
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.
对中国国民党同志共勉，1920年1月1日
Like dear St Francis of Assisi I am wedded to Poverty: but in my case the marriage is not a success.
在我的一生中，大自然的新景象让我像孩子一样欢喜。
Customer satisfaction should be the driving force behind every business decision.