The Weapon Of Criticism Can Never Replace

In A Word, The Free Trade System Hastens The Social Revolution. It Is In This Revolutionary Sense Alone, Gentlemen, That I Vote In Favor Of Free Trade.

Once The Inner Connection Is Grasped, All Theoretical Belief In The Permanent Necessity Of Existing Conditions Collapses Before Their Collapse In Practice -- Letter To Ludwig Kugelmann (july 11, 1868)

The Materialist Doctrine That Men Are Products Of Circumstances And Upbringing, And That, Therefore, Changed Men Are Products Of Other Circumstances And Changed Upbrinding, Forgets That It Is Men That Change Circumstances And That The Educator Himself Needs Educating.

Philosophy Studies The World, But The Point Is To Change It.

Darwin Has Interested Us In The History Of Nature's Technology.