III. Thinking as the Instrument of Knowledge

When thinking is made an object of observation, something which usually escapes our attention is added to the other observed contents of the world. But the usual kind of behaviour, such as is employed also for other objects, is in no way altered. We add to the number of objects of observation, but not to the number of methods. When we are observing other things, there enters among the world-processes—among which I now include observation—one process which is overlooked. There is present something different from every other kind of process, something which is not taken into account. But when I observe my own thinking, there is no such neglected element present. For what hovers now in the background is just thinking itself over again. The object of observation is qualitatively identical with the activity directed upon it. This is another characteristic feature of thinking. When we make it an object of observation, we are not compelled to do so with the help of something qualitatively different, but can remain within the same element.