"...the Sophists, with courageous sauciness, pronounce the reassuring words, "Don't be bluffed!" and diffuse the rationalistic doctrine, "Use your understanding, your wit, your mind, against everything; it is by having a good and well-drilled understanding that one gets through the world best, provides for himself the best lot, the most pleasant life." Thus they recognize in mind man's true weapon against the world. This is why they lay such stress on dialectic skill, command of language, the art of disputation, etc. They announce that mind is to be used against everything; but they are still far removed from the holiness of the Spirit, for to them it is a means, a weapon, as trickery and defiance serve children for the same purpose; their mind is the unbribable understanding.

Today we should call that a one-sided culture of the understanding, and add the warning, "Cultivate not only your understanding, but also, and especially, your heart." Socrates did the same. For, if the heart did not become free from its natural impulses, but remained filled with the most fortuitous contents and, as an uncriticized avidity, altogether in the power of things, i.e. nothing but a vessel of the most various appetites -- then it was unavoidable that the free understanding must serve the "bad heart" and was ready to justify everything that the wicked heart desired...

Daily experience confirms the truth that the understanding may have renounced a thing many years before the heart has ceased to beat for it. So the Sophistic understanding too had so far become master over the dominant, ancient powers that they now needed only to be driven out of the heart, in which they dwelt unmolested, to have at last no part at all left in man. This war is opened by Socrates, and not till the dying day of the old world does it end in peace..." -Max Stirner, The Ego and Its Own