So natural to mankind is intolerance ... that religious freedom has hardly anywhere been practically realized.

Almost all rich veins of original and striking speculation have been opened by systematic half-thinkers.

They who know how to employ opportunities will often find that they can create them; and what we can achieve depends less on the amount of time we possess than on the use we make of our time.

The peculiarity of the evidence of mathematical truths is that all the argument is on one side.

The test of real and vigorous thinking, the thinking which ascertains truths instead of dreaming dreams, is successful application to practice.

Persons of genius, it is true, are, and are always likely to be, a small minority; but in order to have them, it is necessary to preserve the soil in which they grow.

Landlords grow rich in their sleep without working, risking or economizing. The increase in the value of land, arising as it does from the efforts of an entire community, should belong to the community and not to the individual who might hold title.