Augustine of Hippo — as excerpted in the Catena Aurea on Mark 16:19-20

“(de Symbolo, 4) Let us not therefore understand this sitting as though He were placed there in human limbs, as if the Father sat on the left, the Son on the right, but by the right hand itself we understand the power which He as man received from God, that He should come to judge, who first had come to be judged. For by sitting we express habitation, as we say of a person, he sat himself down in that country for many years; in this way then believe that Christ dwells at the right hand of God the Father. For He is blessed and dwells in blessedness, which is called the right hand of the Father; for all is right hand there, since there is no misery. It goes on: And they went forth and preached every where, the Lord working with than, and confirming the word with signs and wonders.”