Profit is the payment you get when you take advantage of change.

Entrepreneurial profit is the expression of the value of what the entrepreneur contributes to production.

Innovations are changes which cannot be decomposed into infinitessimal steps.

Marxism is essentially a product of the bourgeois mind.

The success of everything depends on intuition, the capacity of seeing things in a way which afterwards proves to be true, even though it cannot be established at the moment, and of grasping the essential fact, discarding the unessential, even though one can give no account of the principles by which this is done.

I set out to become the greatest lover in Vienna, the greatest horseman in Austria, and the greatest economist in the world. Alas, for the illusions of youth: as a horseman, I was never really first-rate.

Economic progress, in capitalist society, means turmoil.