(_c_) Here are some cases in which the falsified action persistently repeats itself, and at the same time also changes its mode of action:-- Due to unknown motives, Jones[65] left a letter for several days on his desk, forgetting each time to post it. He ultimately posted it, but it was returned to him from the Dead-letter Office because he forgot to address it. After addressing and posting it a second time it was again returned to him, this time without a stamp. He was then forced to recognize the unconscious opposition to the sending of the letter. (_d_) A short account by Dr. Karl Weiss (Vienna)[66] of a case of forgetting impressively describes the futile effort to accomplish something in the face of opposition. “How persistently the unconscious activity can achieve its purpose if it has cause to prevent a resolution from being executed, and how difficult it is to guard against this tendency, will be illustrated by the following incident: An acquaintance requested me to lend him a book and bring it to him the next day. I immediately promised it, but perceived a distinct feeling of displeasure which I could not explain at the time. Later it became clear to me: this acquaintance had owed me for years a sum of money which he evidently had no intention of returning. I did not give this matter any more thought, but I recalled it the following forenoon with the same feeling of displeasure, and at once said to myself: ‘Your unconscious will see to it that you forget the book, but you don’t wish to appear unobliging and will therefore do everything not to forget it.’ I came home, wrapped the book in paper, and put it near me on the desk while I wrote some letters. “A little later I went away, but after a few steps I recollected that I had left on the desk the letters which I wished to post. (By the way, one of the letters was written to a person who urged me to undertake something disagreeable.) I returned, took the letters, and again left. While in the street-car it occurred to me that I had undertaken to purchase something for my wife, and I was pleased at the thought that it would be only a small package. The association, ‘small package,’ suddenly recalled ‘book’--and only then I noticed that I did not have the book with me. Not only had I forgotten it when I left my home the first time, but I had overlooked it again when I got the letters near which it lay.” (_e_) A similar mechanism is shown in the following fully analysed observation of Otto Rank[67]:--