Dear Posterity, If you have not become more just, more peaceful, and in general more sensible... then may the Devil take you!

Man's will, sustained by an indominable conviction, is much more powerful than material forces that seem insurmountable.

Strenuous intellectual work and the study of God's Nature are the angels that will lead me through all the troubles of this life with consolation, strength, and uncompromising rigor.

One cannot deal with a problem with the same thinking that creates it.

I simply imagine it so, then go about to prove it.

The development of general ability for independent thinking and judgment should always be placed foremost, not the acquisition of special knowledge.

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.