He is not a God of the dead, but of the living: for all live unto him .-- LUKE 20:38
http://www.online-literature.com/george-macdonald/unspoken-sermons/12/
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If the reader of the Gospel supposes that our Lord was here using a verbal argument with the Sadducees, namely, "I am the God of Abraham, Isaac, and Jacob; therefore they are," he will be astonished that no Sadducee was found with courage enough to reply: "All that God meant was to introduce himself to Moses as the same God who had aided and protected his fathers while they were alive, saying, I am he that was the God of thy fathers. They found me faithful. Thou, therefore, listen to me, and thou too shalt find me faithful unto the death."
But no such reply suggested itself even to the Sadducees of that day, for their eastern nature could see argument beyond logic. Shall God call himself the God of the dead, of those who were alive once, but whom he either could not or would not keep alive? Is that the Godhood, and its relation to those who worship it? The changeless God of an ever-born and ever-perishing torrent of life; of which each atom cries with burning heart,My God! and straightway passes into the Godless cold! "Trust in me, for I took care of your fathers once upon a time, though they are gone now. Worship and obey me, for I will be good to you for threescore years and ten, or thereabouts; and after that, when you are not, and the world goes on all the same without you, I will call myself your God still." God changes not. Once God he is always God. If he has once said to a man, "I am thy God, and that man has died the death of the Sadducee's creed," then we have a right to say that God is the God of the dead."