The exterior being has to become aware of the inner—the veil between the inner and outer consciousness has to be removed, it is only then that a real Yogic consciousness begins. The outer has to be merely an instrument or channel for the inner to express itself and communicate with the outer physical world. The inner again has to have free communication with the universal on all the planes—it has to enter into the cosmic consciousness. The outer consciousness has to be remoulded and reshaped through the inner consciousness and the processes that must do it are the psychic by its influence and the higher consciousness by its descent. Naturally, in the process the outer being also will lose its separativeness and become aware of and, in a way, unified with the universal.
Ref: Letters on Yoga – III