Philosophical Fragments, or a Fragment of Philosophy/Johannes Climacus, or De omnibus dubitandum est. (Two books in one volume)

Johannes Climacus does what we are told to do - he actually doubts everything - he suffers through all the pain of doing that, becomes cunning, almost acquires a bad conscience. When he has gone as far in that direction as he can go and wants to come back, he cannot do so...