Catena Aurea on Luke 10:21–22: Titus of Bostra

For all other things have been produced by Christ from nothing, but He alone was incomprehensibly begotten of His Father; Who therefore of the Only-begotten alone, as a true Son, is by nature the Father. Hence He alone says to His Father, I give thanks to thee, O Father, Lord, &c. that is, I glorify thee. Marvel not that the Son glorifies the Father. For the whole substance of the Only-begotten is the glory of the Father. For both those things which were created, and the Angels, are the glory of the Creator. But since these are placed too low in respect of His dignity, the Son alone, since He is perfect God like His Father, perfectly glorifies His Father.