ascension
THE STARGATE OMNIPEDIA
ASCENSION
A term used to describe the process of transcending to a higher plane of existence. Ascension has been accomplished by the Ancients, and a number of other beings they have assisted.

One ascended being in particular -- Oma Desala -- has made it a personal quest to help others ascend.

KEY EPISODE(S) -
Maternal Instinct - SG-1 discovers the world of Kheb, where Oma Desala and another of her kind teach Daniel the powers of ascended beings.
Ascension - Samantha Carter is followed home by Orlin, an alien lifeform who is smitten with her -- and who reveals himself to be an unascended being.
Meridian - After suffering exposure to a lethal dose of radiation, Daniel Jackson is visited by Oma Desala and taught to ascend.
Abyss - Daniel visits Jack in a Goa'uld prison cell, where he tries to convince the colonel that ascension is his only hope of survival.
Full Circle - Daniel Jackson realizes that the ascended beings are the Ancients, and is stopped from attacking Anubis -- once ascended himself -- by Oma Desala or the others.