Philosophy of Existence. Karl Jaspers

events can be known, and so on), bad philosophy reappeared in the sciences in even worse form. But— and this was magnificent and exalting—criticism still existed and was still at work in science itself: not the endless round of philosophical polemic that never leads to any agreement, but the effective, step-by-step criticism that determines the truth for everyone. This criticism destroyed illusions in order to grasp the really knowable in greater purity.