John Trapp on Daniel 4:13

Ver. 13. And behold a Watcher, and an holy One] i. e. An holy Angel, active and watchful to know and do the will and commands of God for the good of the Church. Hence Angels are ſaid to be full of eyes, Ezek. 1. and to ſtand alwaies beholding the face of God, Matth. 18.10. as waiting an employment. How ready was that Angel here, ver. 31. to interrupt the proud King from heaven, and to tell him his doom? So in the next words.