I do not believe that I am now dreaming, but I cannot prove that I am not.

There is no greater reason for children to honour parents than for parents to honour children except, that while the children are young, the parents are stronger than children.

Men fear thought as they fear nothing else on earth - more than ruin, more even than death. Thought is subversive and revolutionary, destructive and terrible, thought is merciless to privilege, established institutions, and comfortable habits; thought is anarchic and lawless, indifferent to authority, careless of the well-tried wisdom of the ages. Thought looks into the pit of hell and is not afraid ... Thought is great and swift and free, the light of the world, and the chief glory of man.

Insight, untested and unsupported, is an uncertain guarantee of the truth.

Love should be a tree whose roots are deep in the earth, but whose branches extend into heaven.

Belief in God and a future life makes it possible to go through life with less of stoic courage than is needed by skeptics.

To be happy in this world, especially when youth is past, it is necessary to feel oneself not merely an isolated individual whose day will soon be over, but part of the stream of life flowing on from the first germ to the remote and unknown future.