Money only appeals to selfishness and always tempts its owners irresistibly to abuse it. Can anyone imagine Moses, Jesus, or Gandhi armed with the money-bags of Carnegie?

The life of the individual has meaning only insofar as it aids in making the life of every living thing nobler and more beautiful. Life is sacred, that is to say, it is the supreme value, to which all other values are subordinate.

Joy and amazement of the beauty and grandeur of this world of which man can just form a faint notion.

Since that deluge of newspaper articles I have been so flooded with questions, invitations, suggestions, that I keep dreaming I am roasting in Hell, and the mailman is the devil eternally yelling at me, showering me with more bundles of letters at my head because I have not answered the old ones.

A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order.

It is harder to crack prejudice than an atom.

I have never obtained any ethical values from my scientific work.