There exists a black kingdom which the eyes of man avoid because its landscape fails signally to flatter them. This darkness, which he imagines he can dispense with in describing the light, is error with its unknown characteristics. Error is certainty's constant companion. Error is the corollary of evidence. And anything said about truth may equally well be said about error: the delusion will be no greater.

Louis Aragon
Another Quote

The Power Of Failure: We Get To Decide What It Means