St. Benedict's Rule for Monasteries

We believe that the divine presence is everywhere and that “the eyes of the Lord are looking on the good and the evil in every place.” But we should believe this especially without any doubt when we are assisting at the Work of God. To that end let us be mindful always of the Prophet’s words, “Serve the Lord in fear” and again “Sing praises wisely” and “In the sight of the Angels I will sing praise to You.” Let us therefore consider how we ought to conduct ourselves in the sight of the Godhead and of His Angels, and let us take part in the psalmody in such a way that our mind may be in harmony with our voice.