The two main requirements for philosophizing are: firstly, to have the courage not to keep any question back; and secondly, to attain a clear consciousness of anything that goes without saying so as to comprehend it as a problem. Finally, the mind must, if it is really to philosophize, also be truly disengaged: it must prosecute no particular goal or aim, and thus be free from the enticement of will, but devote itself undividedly to the instruction which the perceptible world and its own consciousness imparts to it.
