Although borderline patients are suitable for it, they often undergo repeated testing of phantasies against objective reality without success. A reason for these partial failures is that subjects have not been able to build a solid sense of reality and have found many difficulties for processing reality demands and possibilities. The author puts forward some thoughts on this question, such as the importance of working through the depressive position and the Oedipus complex in the process of building up a solid sense of reality. A sense of reality also favours continuous reality processing. When reality processing becomes as continuous as life itself, the repetition of individual reality tests becomes less frequent and necessary, and more satisfying. The author also presents some recommendations for the psychoanalytic treatment of such patients, stressing the importance and the difficulties of the introduction of the borderline patient into the triangular situation because primitive defences—such as disavowal and denial—are mobilized.