Where there is no death there is no need for procreation, and so the exclusive relationship within which procreation takes place is no longer appropriate: "they neither marry nor are given in marriage". This is not to say that there is no love, but there is no need for the exclusivness and jealousy which are an essential part of married life on earth. We may hope that Jesus speaks not of something lost , but of something gained in heaven.
R. T. France, Mark (The People's Bible Commentary) p.161
