Primasius of Hadrumetum — on Rev 4:5 (COMMENTARY ON THE APOCALYPSE 4:5)

“These seven lamps are the seven spirits of God. Even if he had not explained it, we would have properly understood these seven lamps to represent the Holy Spirit. For we know that at the beginning he had illuminated the apostles in the form of fiery tongues, and [we are aware] of his sevenfold operation. How much more clear is it, when now he himself adds, "which are the seven spirits of God." But where is the Holy Spirit more properly said to be present than at the time of baptism, when we believe that each one of the faithful have properly received him.”