This so far is my favourite extract:
There is only one mistake in Kant's theory of radical evil. He does not make it clear that the inexplicable, the paradox, is a category of its own. Everything depends upon that. Until now, people have always expressed themselves in the following way: the knowledge that one cannot understand this or the other thing does not satisfy science, the aim of which is to understand. Here is the mistake; people ought to say the very opposite: if human science refuses to understand that there is something which it cannot understand, or better still, that there is something about which it clearly understands that it cannot understand it-- then all is confusion. For it is the duty of the human understanding to understand that there are things which it cannot understand, and what those things are. Human understanding has vulgarly occupied itself with nothing but understanding, but if it would only take the trouble to understand itself at the same time it would simply have to posit the paradox. The paradox is not a concession but a category, an ontological definition which expresses the relation between an existing cognitive spirit and eternal truth. (1847)

icq для телефона