All these days I did appear to you; but I did neither eat nor drink, but you did see a vision.
All Commentaries on Tobit 12:19 Go To Tobit 12
John of Damascus
AD 749
The angels see God to such extent as is possible for them, and this is their food. Although, because they are incorporeal, they are superior to us and free of all bodily passion, they are certainly not passionless, because only the Divinity is passionless. They take whatever form the Lord may command, and thus they appear to people and reveal the divine mysteries to them. They live in heaven and have as their one work to sing the praises of God and minister to his sacred will.