It belongs to the self-respect of intellect to pursue every tangle of thought to its final unravelment.

The world is shocked, or amused, by the sight of saintly old people hindering in the name of morality the removal of obvious brutalities from a legal system.

To see what is general in what is particular, and what is permanent in what is transitory, is the aim of scientific thought.

It requires a very unusual mind to undertake the analysis of the obvious.

Life is an offensive, directed against the repetitious mechanism of the Universe.

It is natural to think that an abstract science cannot be of much importance in affairs of human life, because it has omitted from its consideration everything of real interest.

Civilization advances by extending the number of important operations which we can perform without thinking about them. Operations of thought are cavalry charges in a battle - they are limited in number, they require fresh horses, and must only be made at decisive moments.