sentences:  These instincts could be compared to the "drives" discussed in psychoanalysis and other domains of psychology.Several readers of Jung have observed that in his treatment of the collective unconscious, Jung suggests an unusual mixture of primordial, "lower" forces, and spiritual, "higher" forces.Jung believed that proof of the existence of a collective unconscious, and insight into its nature, could be gleaned primarily from dreams and from active imagination, a waking exploration of fantasy.