Charles H. Spurgeon on Psalms 89:15

—There is the dreadful and there is the joyful sound. The dreadful sound was at Mount Sinai. The joyful sound is from Mount Sion. When the people heard the former they were far from beholding the glory of God's face. Moses only was admitted to see His "back parts"; the people were kept at a distance, and the light of God's glory that they saw was so terrible to them, that they could not abide it. But they that know the "joyful sound." they shall be admitted near, nearer than Moses, so as to see the glory of God's face or brightness of his countenance, and that not only transiently, as Moses saw God's back parts, but continually. The light of God's glory shall not be terrible to them, but easy and sweet, so that they may dwell in it and walk in it; and it shall be to them instead of the light of the sun; for the sun shall no more be their light by day, nor the moon by night, but God shall be their everlasting light, Compare this with Isa 2:5 Re 21:23-24 Re 22:4-5 —Jonathan Edwards