The full man does not understand the wants of the hungry

In the domain of Political Economy, free scientific inquiry meets not merely the same enemies as in all other domains. The peculiar nature of the material it deals with, summons as foes into the field of battle the most violent, mean and malignant passions of the human breast, the Furies of private interest.

The meaning of peace is the absence of opposition to socialism.

But the more these conscious illusions of the ruling class are shown to be false and the less they satisfy common sense, the more dogmatically they are asserted and the more deceitful, moralizing and spiritual becomes the language of established society.

In this sense, the theory of the Communists may be summed up in the single sentence: Abolition of private property. - Manifesto of the Communist Party

Experience praises the most happy the one who made the most people happy.

Wages are determined by the bitter struggle between capitalist and worker.