An unprejudiced mind is probably the rarest thing in the world; to nonprejudice I attach the greatest value.

Never have I been able to settle in life. Always seated askew, as if on the arm of a chair; ready to get up, to leave.

Believe in your strength and your vision. Learn to repeat to yourself, 'It all depends on me'.

No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.

Great minds tend toward banality. It is the noblest effort of individualism. But it implies a sort of modesty, which is so rare that it is scarcely found except in the greatest, or in beggars.

Fear of ridicule begets the worst cowardice.

A desire for truth is by no means a need for certitude and it would be unwise to confuse one with the other.