they believe that the docrine of ressurection is something that is in the Bible (underlying) even from page one. It`s all there, as part of Gods plan. However, is the ressurection really a part of the OT?
Right....it is hard to reconcile these texts with a belief in the resurrection:
"There is always hope for a tree; when felled it can start its life again; its shoots continue to sprout. Its roots may be decayed in the earth. its stump withering in the soil, but let it scent the water, and it buds, and puts out branches like a new plant. But man? He dies, and lifeless he remains; man breathes his last, and then where is he? The waters of the seas may disappear, and all the rivers may run dry or drain away; but man, once in his resting place, will never rise again....Soon or later the mountain falls, the rock moves from its place, water wears away the stones, the cloudburst erodes the soil. Just so do you destroy man's hope" (Job 14:7-12, 18-19).
"The living know at least that they will die, the dead know nothing; no more reward for them, their memory has passed out of mind. Their loves, their hates, their jealousies, these all have perished, nor will they ever again take part in whatever is done under the sun" (Ecclesiastes 9:5-6).
How can the Society quote Ecclesiastes 9:5 in support of their doctrine of annihilationism, yet ignore the very next verse which denies a hope of a future resurrection. In fact, Ecclesiastes is generally regarded as a proto-Sadducee work, representing the conservative eschatology of this post-exilic group. The eschatology of the early Christian church is Pharisaic, and Jesus in the synoptic gospels directly refutes the kind of philosophy espoused in Ecclesiastes. The Sadducees, of course, rejected any belief of the resurrection, which was a newer development in early Judaism.
However, is the ressurection really a part of the OT?
It just barely made it into the OT; it appears in its explicit form only in Daniel (cf. 12:2-3), one of the latest books admitted into the Hebrew canon (in fact, the canon of the Prophets was already closed, so it was one of the last books admitted into the Writings). The Greek LXX, meanwhile, inserted the belief of the resurrection elsewhere into the OT, most conspicuously in Job. The Greek Bible used by the early Christians thus had a more robust belief of the resurrection than the original Hebrew scriptures.