Medicine heals doubts as well as diseases.
Religion is the opiate of the people.
Nothing can have value without being an object of utility.
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.
Force is the midwife of every old society pregnant with a new one.
Money is the alienated essence of man's work and existence; this essence dominates him and he worships it.