唯一
《致全国学农工商通电》（1924年4月12日）
《致陈新政及南洋同志书》（1914年6月15日）
There is only one good, which is knowledge, and one evil, which is ignorance.
India has 2,000,000 gods, and worships them all. In religion other countries are paupers; India is the only millionaire.
Prophesying was the only human art that couldn't be improved by practice.
Fame is vapor; popularity an accident; the only earthly certainty is oblivion.
He is the only animal that loves his neighbor as himself, and cut his throat if his theology isn't straight.
Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. And not to Democrats alone do I make this appeal, but to all who love these great and true principles.