Hebrews 5:8

Though He WAS (so it ought to be translated: a positive admitted fact: not a mere supposition as were would imply) God's divine Son (whence, even in His agony, He so lovingly and often cried, Father, Mat 26:39), yet He learned His (so the Greek) obedience, not from His Sonship, but from His sufferings. As the Son, He was always obedient to the Father's will; but the special obedience needed to qualify Him as our High Priest, He learned experimentally in practical suffering. Compare Phi 2:6-8, "equal with God, but . . . took upon Him the form of a servant, and became obedient unto death," &c. He was obedient already before His passion, but He stooped to a still more humiliating and trying form of obedience then. The Greek adage is, "Pathemata mathemata," "sufferings, disciplinings." Praying and obeying, as in Christ's case, ought to go hand in hand.

In this chapter the apostle continues his discourse upon the priesthood of Christ, a sweet subject, which he would not too soon dismiss. And here, I. He explains the nature of the priestly office in general (Heb 5:1-3). II. The proper and regular call there must be to this office (Heb 5:4-6). III. The requisite qualifications for the work (Heb 5:7-9). IV. The peculiar order of the priesthood of Christ; it was not after the order of Aaron, but of Melchisedec (Heb 5:6, Heb 5:7, Heb 5:10). V. He reproves the Hebrews, that they had not made those improvements in knowledge which might have made them capable of looking into the more abstruse and mysterious parts of scripture (Heb 5:11-14).

5:8 he learned obedience from the things he suffered: Jesus was not disobedient before his suffering, but he walked his path of human experience—all the way to his death on the cross—in complete submission to the Father’s will. We are expected to travel the same path (12:1-11).