Condemnation before investigation is the highest form of ignorance.

Genius is 1% talent and 99% percent hard work.

No idea is conceived in our mind independent of our five senses [i.e., no idea is divinely inspired].

Children don’t heed the life experiences of their parents, and nations ignore history. Bad lessons always have to be learned anew.

The discovery of nuclear reactions need not bring about the destruction of mankind any more than the discovery of matches.

Though our conduct seems so very different from that of the higher animals, the primary instincts are much alike in them and in us.

The greatest activity of which man is capable: Opening up yet another fragment of the frontier of beauty.