The principal axiom in their theory was: Everything can be proved, and everything can be disproved; and in the process, one must profit as much from the folly of others, and from his own superiority, as he can.

The state has physical power and uses it when necessary; the power of religion is love and beneficence

Judaism boasts of no exclusive revelation of eternal truths that are indispensable to salvation, of no revealed religion in the sense in which that term is usually understood.

For a game it is too serious, for seriousness too much of a game.

You know how much I am inclined to explain all disputes among philosophical schools as merely verbal disputes or at least to derive them originally from verbal disputes

The analysis of concepts is for the understanding nothing more than what the magnifying glass is for sight

A God is thinkable, therefore a God is also actually present