An angel is an intelligent essence, always in motion. It has free will, is incorporeal, serves God, and has been bestowed with immortality. Only the Creator understands its true nature.

If the Word of God is living and powerful, and if the Lord does all things whatsoever he wills; if he said, "Let there be light", and it happened; if he said, "let there be a firmament", and it happened; ...if finally the Word of God himself willingly became man and made flesh for himself out of the most pure and undefiled blood of the holy and ever Virgin, why should he not be capable of making bread his Body and wine and water his Blood?... God said, "This is my Body", and "This is my Blood."

All who ask receive, those who seek find, and to those who knock it shall be opened. Therefore, let us knock at the beautiful garden of Scripture. It is fragrant, sweet, and blooming with various sounds of spiritual and divinely inspired birds. They sing all around our ears, capture our hearts, comfort the mourners, pacify the angry, and fill us with everlasting joy.

Because the one who by excellency of nature transcends all quantity and size and magnitude...has now...contracted himself into a quantity and size and has acquired a physical identity, do not hesitate any longer to draw pictures and to set forth, for all to see, him who has chosen to let himself be seen.

...we shall incur no slight injury, but rather great danger, if we rashly yield ourselves to the inclinations of men who aim at exciting strife and tumults, so as to draw us away from what is good? Let us cleave, therefore, to those who cultivate peace with godliness?

Gluttony should be destroyed by self-control; unchastity by desire for God and longing for the blessings held in store; avarice by compassion for the poor; anger by goodwill and love for all men; worldly dejection by spiritual joy; listlessness by patience, perseverance and offering thanks to God; self-esteem by doing good in secret and by praying constantly with a contrite heart; and pride by not judging or despising anyone in the manner of the boastful Pharisee (cf. Lk. 18:11-12), and by considering oneself the least of all men.

All we know if an angel is that it is incorporeal, immaterial, and only by comparing it with God-who is incomparable-can we see that it has some density and body after all, since in reality only God is truly immaterial and incorporeal.