Every book is a quotation; and every house is a quotation out of all forests, and mines, and stone quarries; and every man is a quotation from all his ancestors.

If you can't explain your chemistry to a non-scientist, you don't understand it well enough.

I'm not going to change who I am because of what people say.

——〈中国问题的真解决〉，与伦敦《滨海杂志》记者谈话，1911年11月

"I love the pressure. I love the big moments. That’s what I play for."

Strength does not come from winning. When you go through hardships and decide not to surrender, that is strength.

If you're not failing, you're not trying hard enough.