Matthew 22:32

Jesus appeals to the Pentateuch when arguing with the Sadducees, with whom the books of Moses had the greatest authority.

Stated in a logical form the argument is: God is a God of the living only, but He is the God of Abraham, therefore Abraham is living. The same deduction from the words was made by the later Rabbinical writers.

The principle on which the proposition "God is the God of the living" rests, lies deeper. It depends upon the close relation between the life of God and the life of His children. The best illustration of the truth is the parable of the Vine (John 15:1-8). The connection between the living God and the patriarchs, whose God He is, is as close as that between the vine and its branches. If the vine lives its branches live. If God is living and immortal the patriarchs are living and immortal. If the branches die they cease to belong to the vine; if the patriarchs were dead they would have ceased to have any relation to God, or God to them.

So far there has been proof of immortality.

The argument for the Resurrection is inferred. For if the patriarchs are living, they are living in Sheôl, or Hades, and therefore they are awaiting a resurrection; cp. Hebrews 11:16. For this thought see Meyer ad loc.