The opinion prevailed among advanced minds that it was time that belief should be replaced increasingly by knowledge; belief that did not itself rest on knowledge was superstition, and as such had to be opposed.

Reason is intuition's servant.

There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!

The road to perdition has ever been accompanied by lip service to an ideal.

Unlimited competition leads to a huge waste of labor, and to that crippling of the social consciousness of individuals.

Solutions to tough problems should be made as simple as possible - and no simpler.

The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.