18 Then Jesus was approached by some Sadducees-religious leaders who say there is no resurrection from the dead. They posed this question: 19 "Teacher, Moses gave us a law that if a man dies, leaving a wife without children, his brother should marry the widow and have a child who will carry on the brother's name. 20 Well, suppose there were seven brothers. The oldest one married and then died without children. 21 So the second brother married the widow, but he also died without children. Then the third brother married her. 22 This continued with all seven of them, and still there were no children. Last of all, the woman also died. 23 So tell us, whose wife will she be in the resurrection? For all seven were married to her." 24 Jesus replied, "Your mistake is that you don't know the Scriptures, and you don't know the power of God. 25 For when the dead rise, they will neither marry nor be given in marriage. In this respect they will be like the angels in heaven. 26 "But now, as to whether the dead will be raised-haven't you ever read about this in the writings of Moses, in the story of the burning bush? Long after Abraham, Isaac, and Jacob had died, God said to Moses, 'I am the God of Abraham, the God of Isaac, and the God of Jacob.' 27 So he is the God of the living, not the dead. You have made a serious error."
Matthew Henry's Commentary on Mark 12:18-27
Commentary on Mark 12:18-27
(Read Mark 12:18-27)
A right knowledge of the Scripture, as the fountain whence all revealed religion now flows, and the foundation on which it is built, is the best preservative against error. Christ put aside the objection of the Sadducees, who were the scoffing infidels of that day, by setting the doctrine of the future state in a true light. The relation between husband and wife, though appointed in the earthly paradise, will not be known in the heavenly one. It is no wonder if we confuse ourselves with foolish errors, when we form our ideas of the world of spirits by the affairs of this world of sense. It is absurd to think that the living God should be the portion and happiness of a man if he is for ever dead; and therefore it is certain that Abraham's soul exists and acts, though now for a time separate from the body. Those that deny the resurrection greatly err, and ought to be told so. Let us seek to pass through this dying world, with a joyful hope of eternal happiness, and of a glorious resurrection.