P.-J. Proudhon, System of Economical Contradictions…
“ But neither contradiction nor antinomy, which analysis discovers at the bottom of every simple idea, is the principle of truth. Contradiction is always synonymous with nullity; as for antinomy, sometimes called by the same name, it is indeed the forerunner of truth, the material of which, so to speak, it supplies; but it is not truth, and, considered in itself, it is the efficient cause of disorder, the characteristic form of delusion and evil. ”
