Cosmic body is sum of all individual soul bodies or energies. When person realize own individuality he enters in cosmic body. All energetic evolution till universal body is linear and have a way or path for realization. You can track for example tree till seed, but what is before a seed. Their is no visible connection from cosmic to universal body. Their is a way from individual to cosmic body, their is a way from physical to emotional, from emotional to spiritual, from spiritual to individual, from individual to cosmic, but their no visible way from cosmic to universal or nirvanic body. Also their is nothing what person can do to realize universal body or enlightenment.
Wisdom is path, and wisdom have paths to enlightenment. Do nothing, but fill wisdom paths to total liberty. Knowledge have linear ways and can't help, wisdom works without knowledge and always have a paths to enlightenment. Knowledge works with something known and wisdom is in unknown.
Forget any kind of self-realization or enlightenment and forget mind tricks just surrender and work without resistance. You can't do nothing to realize nirvanic or universal body. This will happen or this will not happen.