Man is a machine and in the whole universe there is but a single substance, matter, variously modified.

Love conquers everything even karma.

Who lives as a citizen, may write as a philosopher - but write as a philosopher, it is to teach materialism!

It is convention and arbitrary rewards which make all the merit and demerit of what we call vice and virtue.

Man is a machine and in the whole universe there is but a single substance, matter, variously modified.

The human body is a machine that winds up its own springs: it is a living image of the perpetual motion.

The brain has muscles for thinking as the legs have muscles for walking.