Ethical metaphysics is fundamentally an attempt, however disguised, to give legislative force to our own wishes.

Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy dare live.

When you come to look into this argument from design, it is a most astonishing thing that people can believe that this world, with all the things that are in it, with all its defects, should be the best that omnipotence and omniscience has been able to produce in millions of years.

The really useful education is that which follows the direction of the child's own instinctive interests, supplying knowledge for which it is seeking, not dry, detailed information wholly out of relation to its spontaneous desires.

Only mathematics and mathematical logic can say as little as the physicist means to say.

Frege has the merit of ... finding a third assertion by recognising the world of logic which is neither mental nor physical.