The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

People, even more than things, have to be restored, renewed, revived, reclaimed, and redeemed; never throw out anyone.

The key to progress in science is persistence and an open mind.

我唯一知道的是我一无所知。