In a footnote to The Essence of Christianity (Part II, Ch. XXV), Feuerbach gets at what I take to be a significant mechanism involved in the Thelemic Eucharist:
Man is occupied with himself in and through God. God is the means of human existence and happiness. This religious truth, embodied in a cultus, in a sensous form, is the Lord's Supper. In this sacrament man feeds upon God -- the Creator of heaven and earth -- as on material food; by the act of eating and drinking he declares God to be a mere means of life to man. Here man is virtually supposed to be the God of God: hence the Lord's Supper is the highest self-enjoyment of human subjectivity. Even the Protestant -- not indeed in words, but in truth -- transforms God into an external thing, since he subjects Him to himself as an object of sensational enjoyment.