Another angel. That is, not one of the seven angels with the trumpets.
The altar. Compare Ex. 30:1–10.
Censer. Compare Lev. 10:1.
Much incense. See Ex. 30:34–38.
With the prayers. The picture is that of the angel adding incense to the prayers of the saints as these prayers ascend to the throne of God. The scene portrayed may be understood as symbolic of the ministration of Christ for His people (see Rom. 8:34; 1 John 2:1). Christ, as intercessor, mingles His merits with the prayers of the saints, which are thereby made acceptable with God.