The so-called “reality principle,”—acting in accordance with predictable consequences rather than just immediate pleasure or discharge—requires the ability to fantasize. There are several environmental (“nurture”) factors which contribute to the successful development of this ability. These are: an abundance of pleasurable experiences which can be anticipated; a moderate number of adverse events, which have been “detoxified” by their association with emotional support; and, in addition, exposure to vicarious experiences, but only according to the same rules—that is, such experiences should be primarily positive, and if negative, then associated with a positive emotional context.