Let us tarry a moment longer over the assertion that errors are psychic acts. Does such an assertion contain more than the former declaration that they have a meaning? I do not believe so. On the contrary, it is rather more indefinite and open to greater misunderstanding. Everything which can be observed about the psychic life will on occasion be designated as a psychic phenomenon. But it will depend on whether the specific psychic manifestations resulted directly from bodily, organic, material influences, in which case their investigation will not fall within the province of psychology, or whether it was more immediately the result of other psychic occurrences back of which, somewhere, the series of organic influences then begins. We have the latter condition of affairs before us when we designate a phenomenon as a psychic manifestation, and for that reason it is more expedient to put our assertion in this form: the phenomena are meaningful; they have a meaning. By "meaning" we understand significance, purpose, tendency and position in a sequence of psychic relations. There are a number of other occurrences which are very closely related to errors, but which this particular name no longer fits. We call them _accidental and symptomatic_ acts. They also have the appearance of being unmotivated, the appearance of insignificance and unimportance, but in addition, and more plainly, of superfluity. They are differentiated from errors by the absence of another intention with which they collide and by which they are disturbed. On the other side they pass over without a definite boundary line into the gestures and movements which we count among expressions of the emotions. Among these accidental acts belong all those apparently playful, apparently purposeless performances in connection with our clothing, parts of our body, objects within reach, as well as the omission of such performances, and the melodies which we hum to ourselves. I venture the assertion that all these phenomena are meaningful and capable of interpretation in the same way as are the errors, that they are small manifestations of other more important psychic processes, valid psychic acts. But I do not intend to linger over this new enlargement of the province of psychic phenomena, but rather to return to the topic of errors, in the consideration of which the important psychoanalytic inquiries can be worked out with far greater clarity.