Morality in sexual relations, when it is free from superstition, consists essentially in respect for the other person, and unwillingness to use that person solely as a means of personal gratification, without regard to his or her desires.

One must expect a war between U.S.A. and U.S.S.R. which will begin with the total destruction of London. I think the war will last 30 years, and leave a world without civilised people, from which everything will have to build afresh - a process taking (say) 500 years.

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.

The luxury to disparage freedom is the privilege of those who already possess it.

Those who advocate common usage in philosophy sometimes speak in a manner that suggests the mystique of the 'common man.'

There is much pleasure to be gained from useless knowledge.

Have no respect for the authority of others, for there are always contrary authorities to be found