Imagination is the highest form of research.

I have lived to prove Thoreau's contention that a man is rich in proportion to the number of things which he can afford to let alone.

Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.

All means prove but blunt instruments, if they have not behind them a living spirit.

A conflict arises when a religious community insists on the absolute truthfulness of all statements recorded in the Bible. This means an intervention on the part of religion into the sphere of science; this is where the struggle of the Church against doctrines of Galileo and Darwin belongs.

The Press, which is mostly controlled by vested interests, has an excessive influence on public opinion.

I am strongly drawn to a frugal life and am often oppressively aware that I am engrossing an undue amount of the labor of my fellow men.