if a blind bumps against a rock, nobody can accuse him of any mistake. But if someone seeing does so, it is obviously a coarse mistake, since he could see, that a stone lies on the path. And it is even more so with spiritual matters. Who, based on his soul blindness, cannot understand these signs and words which I do and speak, it will not be counted as a sin against him, however to him manifold, who sees and still stays an enemy of the truth! – The Great Gospel of John, Book 6, Chapter 220, Paragraph 2