Neoplatonists agreed as to the immortality of the rational soul but disagreed as to whether man's "irrational soul" was immortal and celestial ("starry", hence astral) or whether it remained on earth and dissolved after death. The late Neoplatonist Proclus, who is credited the first to speak of subtle "planes", posited two subtle bodies or "carriers" ("okhema") intermediate between the rational soul and the physical body. These were; 1) the astral vehicle which was the immortal vehicle of the Soul and 2) the spiritual ("pneuma") vehicle, aligned with the vital breath, which he considered mortal.