John Chrysostom

[In monasteries] at the crowing of the rooster their leader comes, and gently touching the sleeper with his foot, rouses them all. For there are none sleeping naked. Then as soon as they have arisen they stand up and sing the prophetic hymns with much harmony and well-composed tunes. And neither harp nor pipe nor other musical instrument utters such sweet melodies as you hear from the singing of these saints in their deep and quiet solitudes. And the songs themselves too are suitable and full of the love of God. "In the night," they say, "lift up your hands to God. With my soul have I desired you in the night; truly with my spirit within me will I seek you early."