The more dubious and uncertain an instrument violence has become in international relations, the more it has gained in reputation and appeal in domestic affairs, specifically in the matter of revolution.

What really distinguishes this generation in all countries from earlier generations ... is its determination to act, its joy in action, the assurance of being able to change things by one's own efforts.

Death not merely ends life, it also bestows upon it a silent completeness, snatched from the hazardous flux to which all things human are subject.

Political questions are far too serious to be left to the politicians.

Entirely new concepts are very rare in politics.

Mathematics, the non-empirical science par excellence . . . the science of sciences, delivering the key to those laws of nature and the universe which are concealed by appearances.

All political institutions are manifestations and materializations of power; they petrify and decay as soon as the living power of the people ceases to uphold them.