Work is external to the worker. . . . It is not part of his nature; consequently he does not fulfill himself in his work but denies himself. . . . The worker therefore feels himself at home only during his leisure time, whereas at work he feels homeless.

Religion is the impotence of the human mind to deal with occurrences it cannot understand.

Every emancipation is a restoration of the human world and of human relationships to a man himself.

Social progress can be measured exactly by the social position of the fair sex.

The redeeming feature of war is that it puts a nation to the test. As exposure to the atmosphere reduces all mummies to instant dissolution, so war passes supreme judgment upon social systems that have outlived their vitality.

The method of production of the material things of life generally determines the social, political and spiritual currents of life.

All science would be superfluous if the outward appearance and the essence of things directly coincided.