The three words given in the title of our essay—mind, consciousness, the unconscious— not only stand for three central and fundamental psychological issues. They are to a much greater extent methodological issues, i.e., issues about principles of the formation of psychological science itself. This was superbly expressed by Lipps² [1897, p. 146] in his well-known definition of the problem of the subconscious which says that the subconscious is not so much a psychological problem but the problem of psychology. [1]