More cranks take up unfashionable errors than unfashionable truths.

Philosophy is an unusually ingenious attempt to think fallaciously.

The resistance to a new idea increases by the square of its importance.

The most valuable things in life are not measured in monetary terms. The really important things are not houses and lands, stocks and bonds, automobiles and real state, but friendships, trust, confidence, empathy, mercy, love and faith.

If all our happiness is bound up entirely in our personal circumstances it is difficult not to demand of life more than it has to give.

Science can teach us, and I think our hearts can teach us, no longer to look around for imaginary supporters, no longer to invent allies in the sky, but rather to look to our own efforts here below to make the world a fit place to live.

Men fear thought as they fear nothing else on earth - more than ruin, more even than death.