"God" who is eternally complete, who directs the stars, who is the master of fates, who elevates man from his lowliness to himself, who speaks from the cosmos to every single human soul, is the most brilliant manifestation of the goal of perfection to date.* In "God's nature", religious mankind perceives the way to height. In his call it hears again the innate voice of life which must have its direction towards the goal of perfection, towards overcoming the feeling of lowliness and transitoriness of the existence here below. The "human soul", as a part of the movement of life, is endowed with the ability to participate in the uplift, elevation, perfection, and completion.
*But of course Adler could not have known about "Transhumanism" or "Extropianism".