"Most assuredly I tell you, he who hears my word, and believes him who sent me, has eternal life, and doesn't come into judgment, but has passed out of death into life.
Hath eternal life ... This focuses upon the true mission of our Lord's coming into the world, to bring men eternal life.  The Pharisees, had they been the type of persons who are interested in such a blessing, might have been convinced by such a promise; but they were too busy with their earthly concerns to pay any attention to the great hope held out in these words. Eternal life is here spoken of as a present possession of the recipient; but that present possession must be understood as a title deed in the form of God's own promise of a state of bliss following the resurrection of the dead.  Such an inheritance, though in a sense only prospective, creates such a profound change in the life of the possessor, coloring his entire life, transforming even sorrows and hardships, and providing the motivation of a higher life-style - so vast a change, in fact, that, in the sense intended here, the believer truly HAS eternal life.