Labour is ... not the only source of material wealth, i.e, of the use-values it produces. As William Petty says, Labour is the father of material wealth, the earth is its mother.

Reason has always existed, but not always in a reasonable form.

The ruling ideas of each age have ever been the ideas of its ruling class.

Machines were, it may be said, the weapon employed by the capitalists to quell the revolt of specialized labor.

Religion is the opium of the masses.

You will have to go through 15, 20, 50 years of civil wars and national struggles not only to bring about a change in society but also to change yourselves, and prepare yourselves for the exercise of political power.

Democracy is the road to socialism.