In verses 14:15-31 of John, Jesus promises believers comfort from 5 supernatural blessings that the world does not enjoy: 1) a supernatural Helper (vv. 15-17); 2) a supernatural life (vv. 18,19); 3) a supernatural union (vv. 20-25); 4) a supernatural Teacher (v. 26); and 5) a supernatural peace (vv. 27-31). The key to all of this is John 14:15 which relates that these supernatural promises are for those who love Jesus Christ, whose love is evidenced by obedience.
Commentary from the MacArthur study Bible, summary notes for John 14:15-31.