Life is an offensive, directed against the repetitious mechanism of the Universe.

Fertilization of the soul is the reason for the necessity of art.

Our reasonings grasp at straws for premises and float on gossamers for deductions.

We think of the number "five" as applying to appropriate groups of any entities whatsoever - to five fishes, five children, five apples, five days... We are merely thinking of those relationships between those two groups which are entirely independent of the individual essences of any of the members of either group. This is a very remarkable feat of abstraction; and it must have taken ages for the human race to rise to it

It is not paradox to say that in our most theoretical moods we may be nearest to our most practical applications.

There is a tradition of opposition between adherents of induction and of deduction. In my view it would be just as sensible for the two ends of a worm to quarrel.

Some of the finest moral intuitions come to quite humble people. The visiting of lofty ideas doesn't depend on formal schooling.