“To know what you know and what you do not know, that is true knowledge.”

The problem of the twentieth century is the problem of the color line.

The superior man is modest in his speech, but exceeds in his actions.

I think, therefore I am.

If it is not right do not do it; if it is not true do not say it.

Do not seek to follow in the footsteps of the wise. Seek what they sought.

We all have strength enough to endure the misfortunes of others.

In all things, have no preferences.

Bigotry tries to keep truth safe in its hand with a grip that kills it.