Eschatology is the study of future things, of prophecy fulfilled and unfulfilled in the Bible. This thread will have a much more narrow focus, so please don't make it about prophecy per se. Eschatology intersects with Christology, the doctrine of Christ in the doctrine of the Second Coming. However, more importantly to the cause of orthodox Christianity, the full preterist insistence that Christ came spiritually in AD 70 has very serious consequences for Christology proper.
Consider. If Christ came spiritually in AD 70, but did not come physically, then the hypostatic union of Christ as 100% human and 100% God is not true. This doctrine was formulated way back in 325 at the first Council of Nicea in opposition to Arianism. Arius (c. 250-336) was a popular elder from Alexandria who developed a Christology that said Christ was truly a Person, though He was not equally God with the Father, but was eternally subordinate. In answer to this heresy, the council's phraseology was that Christ was 100% God and 100% Man, with neither being subordinate. This is called the hypostatic union.
Later, in the 5th century came the Nestorians, and the Nestorian heresy (which Nestorius probably did not teach) was that the deity and humanity of Christ were separate instead of united.
If the hypostatic union of Christ is true (and it is), then full preterism denies this doctrine. Preterism says that Christ came spiritually in AD 70, and therefore there is no need for a physical coming of Christ. But if Christ came spiritually, then the deity and humanity of Christ were divided. How could the spiritual part of Christ come to earth and the physical part stay in Heaven? The human soul of Christ and the spiritual nature, God Himself, are eternally united in Christ.
So when was the soul/spirit of Christ divided from the physical body? On the cross!! With that as a basis for thought, full preterism must then say, "Well, Christ came spiritually, but then His body in Heaven died at that time. Can you see how absurd this is?
Consider. If Christ came spiritually in AD 70, but did not come physically, then the hypostatic union of Christ as 100% human and 100% God is not true. This doctrine was formulated way back in 325 at the first Council of Nicea in opposition to Arianism. Arius (c. 250-336) was a popular elder from Alexandria who developed a Christology that said Christ was truly a Person, though He was not equally God with the Father, but was eternally subordinate. In answer to this heresy, the council's phraseology was that Christ was 100% God and 100% Man, with neither being subordinate. This is called the hypostatic union.
Later, in the 5th century came the Nestorians, and the Nestorian heresy (which Nestorius probably did not teach) was that the deity and humanity of Christ were separate instead of united.
If the hypostatic union of Christ is true (and it is), then full preterism denies this doctrine. Preterism says that Christ came spiritually in AD 70, and therefore there is no need for a physical coming of Christ. But if Christ came spiritually, then the deity and humanity of Christ were divided. How could the spiritual part of Christ come to earth and the physical part stay in Heaven? The human soul of Christ and the spiritual nature, God Himself, are eternally united in Christ.
So when was the soul/spirit of Christ divided from the physical body? On the cross!! With that as a basis for thought, full preterism must then say, "Well, Christ came spiritually, but then His body in Heaven died at that time. Can you see how absurd this is?