But as object of observation, thinking differs essentially from all other things. The observation of a table or of a tree occurs for me as soon as these objects arise on the horizon of my experiences. My thinking about these objects, however, I do not observe at the same time. I observe the table, I carry out my thinking about the table, but I do not observe my thinking at the same moment. I must first transfer myself to a standpoint outside of my own activity, if I want, besides the table, to observe also my thinking about the table. Whereas the observing of objects and occurrences, and the thinking about them, are the entirely commonplace state of affairs with which my going life is filled, the observation of thinking is a kind of exceptional state. This fact must be properly considered when it is a matter of determining the relationship of thinking to all other contents of observation. One must be clear about the fact that in the observation of thinking one is applying to it a way of doing things which constitutes the normal condition for the consideration of all other world content, but which, in the course of this normal state of affairs, does not take place with respect to thinking itself.