Augustine of Hippo — as excerpted in the Catena Aurea on John 5:30

“(Serm. contr. Arrian. c. 9. [xiv.]) As I hear, I judge, is said with reference either to His human subordination, as the Son of man, or to that immutable and simple nature of the Sonship derived from the Father; in which nature hearing and seeing is identical with being. (ut sup. c. xvii.). Wherefore as He hears, He judges. The Word is begotten one with the Father, and therefore judges according to truth. (c. xviii). It follows, And My judgment is just, because I seek not Mine own will, but the will of the Father which hath sent Me. This is intended to take us back to that man (sc. Adam.) who, by seeking his own will, not the will of Him who made him, did not judge himself justly, but had a just judgment pronounced upon him. He did not believe that, by doing his own will, not God’s, he should die. So he did his own will, and died; because the judgment of God is just, which judgment the Son of God executes, by not seeking His own will, i. e. His will as being the Son of man. Not that He has no will in judging, but His will is not His own in such sense, as to be different from the Father’s.”