The boundary in which consciousness can move is prescribed by the sanskaras, and the functioning of consciousness is also determined by the desires. As desires aim at self-satisfaction, the whole consciousness becomes self-centered and individualized. The individualization of consciousness may in a sense be said to be the effect of the vortex of desires. The soul gets enmeshed in the desires and cannot step out of the circumscribed individuality constituted by these desires. It imagines these barriers and becomes self-hypnotized. It looks upon itself as being limited and separate from other individuals. It gets entangled in individualistic existence and imagines a world of manifold separateness composed of many individuals with their respective minds and bodies.
-Discourses 7th Ed, p18