10 But, says He, “He has given Him power to execute judgment also, because He is the Son of Man.” So then that Form is to come to judgment. The Form of Man is to come to judgment; therefore He said, “He has given Him power to execute judgment also, because He is the Son of Man.” The Judge here shall be the Son of Man; here shall That Form judge which was judged. Hear and understand: the Prophet had said this already, “They shall look on Him whom they pierced.” That Very Form shall they see which they smote with a spear.
He shall sit as Judge, Who stood at the judge's seat. He shall condemn the real criminals, Who was made a criminal falsely. He shall come Himself, That Form shall come. This you find in the Gospel too; when before the eyes of His disciples He was going into heaven, they stood and looked on, and the Angelic voice spoke, “You men of Galilee, why stand ye,” etc. “This Jesus shall come in like manner as you see Him going into heaven.” What is, “shall come in like manner”? Shall come in this Very Form.
For “He has given Him power to execute judgment, because He is the Son of Man.” Now see on what principle this was behooveful and right, that they who were to be judged might see the Judge. For they who were to be judged were both good and bad. “But blessed are the pure in heart, for they shall see God.” It remained that in the Judgment the Form of the servant should be manifested both to good and bad, the Form of God be reserved for the good alone.
Source: Sermons on Selected Lessons of the New Testament (New Advent)