Why is the angel's voice described as a lion's roar in Revelation?

In Revelation 10, the angel's voice is depicted as the roar of a lion, symbolizing the tremendous power and authority behind Christ's proclamation. This imagery connects the might of Christ with His role as the triumphant King and the ultimate authority over heaven and earth. The roar of the lion signifies a call to attention, indicating the gravity of the message being delivered. For the early church facing persecution, this imagery would have provided assurance that their struggles were under the sovereign gaze of Christ, and His plans would ultimately prevail, encouraging them to remain steadfast in their faith.