The production of too many useful things results in too many useless people.

If you can cut the people off from their history, then they can be easily persuaded.

The development of civilization and industry in general has always shown itself so active in the destruction of forests that everything that has been done for their conservation and production is completely insignificant in comparison.

When the labourer co-operates systematically with others, he strips off the fetters of his individuality, and develops the capabilities of his species.

The religious world is but a reflex of the real world.

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

Men make their own history but not in circumstances of their own choosing.