From The Quotable Mises — surrounding passage

The Ultimate Foundation of Economic Science , p. 91 One cannot “organize” or “institutionalize” the emergence of new ideas. The Ultimate Foundation of Economic Science , p. 129 In a battle between force and an idea, the latter always prevails. Liberalism , p. 50 Great conflicts of ideas must be solved by straight and frank methods; they cannot be solved by artifices and makeshifts. Planning for Freedom , p. 14

“Thoughts and ideas are not phantoms. They are real things. Although intangible and immaterial, they are factors in bringing about changes in the realm of tangible and material things.”

Theory and History , p. 96 No mass phenomenon can be adequately treated without analyzing the ideas implied. And no new ideas spring from the mythical mind of the masses. Theory and History , p. 263 In the long run even the most despotic governments with all their brutality and cruelty are no match for ideas. Eventually the ideology that has won the support of the majority will prevail and cut the ground from under the tyrant’s feet.