Hayek and the Importance of the Philosophical Foundations of a Free Society

F.A. Hayek as quoted in Winning the War of Ideas:

"Those who have concerned themselves exclusively with what seemed practicable in the existing state of opinion have constantly found that even this has rapidly become politically impossible as the result of changes in a public opinion which they have done nothing to guide. Unless we can make the philosophic foundations of a free society once more a living intellectual issue, and its implementation a task which challenges the ingenuity and imagination of our liveliest minds, the prospects of freedom are indeed dark. But if we can regain that belief in the power of ideas, which was the mark of liberalism at its best, the battle is not lost."