The voice of the LORD is powerful; the voice of the LORD is full of majesty.
Read Chapter 29
Augustine of Hippo
AD 430
4. "The Voice of the Lord is in power" (ver. 4). The Voice of the Lord now in them themselves, making them powerful. "The Voice of the Lord is in great might." The Voice of the Lord working great things in them.
Power and magnificence. The sacraments of confirmation, and the blessed Eucharist, or the wonderful propagation of the Church, amid violent persecutions. (Berthier)