It is not to be forgotten that what we call rational grounds for our beliefs, are often extremely irrational attempts to justify our instincts.

Nothing can be more incorrect than the assumption one sometimes meets, with that physics has one method. chemistry another. and biology a third.

There is no sea more dangerous than the ocean of practical politics, none in which there is more need of good pilotage and of a single unfaltering purpose when the waves rise high.

The great thing in the world is not so much to seek happiness, as to earn peace and self-respect.