In sequence of time, observation does in fact come before thinking. For even thinking we must get to know first through observation. It was essentially a description of an observation when, at the beginning of this chapter, we gave an account of how thinking lights up in the presence of an event and goes beyond what is merely presented. Everything that enters the circle of our experience, we first become aware of through observation. The content of sensation, perception and contemplation, all feelings, acts of will, dreams and fancies, mental pictures, concepts and ideas, all illusions and hallucinations, are given to us through observation.
 But thinking as an object of observation differs essentially from all other objects. The observation of a table, or a tree, occurs in me as soon as these objects appear upon the horizon of my experience. Yet I do not, at the same time, observe my thinking about these things. I observe the table, and I carry out the thinking about the table, but I do not at the same moment observe this. I must first take up a standpoint outside my own activity if, in addition to observing the table, I want also to observe my thinking about the table. Whereas observation of things and events, and thinking about them, are everyday occurrences filling up the continuous current of my life, observation of the thinking itself is a kind of exceptional state. This fact must be properly taken into account when we come to determine the relationship of thinking to all other contents of observation. We must be quite clear about the fact that, in observing thinking, we are applying to it a procedure which constitutes the normal course of events for the study of the whole of the rest of the world-content, but which in this normal course of events is not applied to thinking itself.