This paper examines some difficulties inherent in the process of integration of potentially divergent theoretical positions. It is noted that there is an increasing tendency toward integration of Jungian theory with various models from psychoanalysis and other scientific disciplines. This trend can be understood as relating to the large post-modern current operating in the scientific and cultural communities. As an element of the Zeitgeist, theory integration can proceed with a lack of critical stance on the process itself. An argument is developed on theoretical grounds for urging caution in the implementation of theory integration. The integrative process is examined using dream material from D. W. Winnicott in conjunction with his review of Memories, Dreams, Reflections. Through this discussion, some implications are examined as to the viability of linking Jungian and developmental models.