Since the Devil is the adversary of Christ he should occupy a position equivalent to his and be the Son of God as well. Satan would be the first Son of God and Christ the second.

Essai d’interprétation psycologique du dogme de la Trinité, in Essai sur la symbolique de l’esprit, Paris, 1991, p. 207. As quoted in Curzio Nitoglia, Satanismo nella Psicologia Analitica di Jung: peggio della Psiacanalisi di Freud, Qui Europa (July 4, 2016)