Measures of sterilization should, in my opinion, be very definitely confined to persons who are mentally defective

In the revolt against idealism, the ambiguities of the word experience have been perceived, with the result that realists have more and more avoided the word.

A smell of petroleum prevails throughout.

But I simply can't stand a view limited to this earth, I feel life is so small unless it has windows into other worlds...I like mathematics largely because it is not human.

True happiness for human beings is possible only to those who develop their godlike potentialities to the utmost.

Unfortunately, however, power is sweet, and the man who in the beginning seeks power merely in order to have scope for his benevolence is likely, before long, to love the power for its own sake.

Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.