III. Thinking as the Instrument of Knowledge

I think I have given sufficient reasons for making thinking the starting-point for my study of the world. When Archimedes had discovered the lever, he thought he could lift the whole cosmos from its hinges, if only he could find a point of support for his instrument. He needed a point which was self-supporting. In thought we have a principle which is self-subsisting. Let us try, therefore, to understand the world starting from this basis. Thinking can be grasped by itself. The question is whether we can also grasp anything else through it.