Complete liberty of contradicting and disproving our opinion, is the very condition which justifies us in assuming its truth for purposes of action.

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.

All good things which exist are the fruits of originality.

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

One person with a belief is equal to ninety-nine who have only interests.

Complete liberty of contradicting and disproving our opinion, is the very condition which justifies us in assuming its truth for purposes of action.

To understand one woman is not necessarily to understand any other woman.