In the progress of the book of Revelation, we see John moved by different affections. He trembles in chapter 1:17; he weeps in chapter 5:4; he wonders with great astonishment in chapter 17:6; he loses himself in worshiping delight in chapters 19:10 and 22:8.
That is, he trembles in the presence of the judicial glory of the Son of man; he weeps at the sight of a sealed book which had it been unsealed, would have told secrets about Jesus; he marvels at the sight of Christendom's apostasy; he loses himself in joy when he hears of the marriage of the Lamb, and when he sees the bride of the Lamb.
What suited affections! what creations of the Holy Spirit in the soul of a saint! He never trembles after the One who was alive tells him not to fear. He that had the keys of death and hades encourages him; and that, surely, is enough for us.