Jerome : (Verse 8.) And he looked closely with much attention, and the lion cried out: I am standing continually on the watchtower of the Lord, both day and night. And that lookout who was positioned to see what was coming cried out like a lion, or rather, he is called a lion himself as a prophet. And because there was doubt about the identity of the lookout who had seen Cyrus ascending, he explains more explicitly and says: "I am standing on the lookout of the Lord constantly throughout the day, declaring himself to be the lookout of the Lord, who is always stationed in the prophetic office, and who, in the days and nights of the Lord's command, speaks whatever He orders." — Commentary on Isaiah Jerome : (Verse 8.) I am a watchman of the Lord, standing continuously during the day, and I am a guard of my duty, standing all through the night. LXX: The Lord said: I have stood throughout the day, and I have stood over the camp throughout the night. The Prophet stands on the lookout of the Lord, and in his light, he sees what is to come. He has this responsibility, and this task assigned to him, to see what is to come in the darkness of this age. — Commentary on Isaiah