Jamieson, Fausset and Brown on Revelation 4:5

5. proceeded--Greek, "proceed."

thunderings and voices--The two oldest manuscripts transpose, "voices and thunderings." Compare at the giving of the law on Sinai, Ex 19:16. "The thunderings express God's threats against the ungodly: there are voices in the thunders (Re 10:3), that is, not only does He threaten generally, but also predicts special judgments" [Grotius].

seven lamps ... seven Spirits--The Holy Spirit in His sevenfold operation, as the light-and-life Giver (compare Re 5:6, seven eyes ... the seven Spirits of God; Re 1:4; 21:23; Psa 119:105) and fiery purifier of the godly, and consumer of the ungodly (Mt 3:11).