5:5 So also Christ glorified not himself to be made an high priest. Did not take the office of himself, but God called him to his priesthood. The time is pointed out when he was so called.
But he that said unto him. It was when God said, in Ps 2:7,
Thou art my son, to day have I begotten thee. This refers to when Christ was begotten from the dead, the first-born of the new creation. See Eph 1:20-23. At this time he entered fully, at the call of God, upon his high priesthood in behalf of men.
5:5 So also Christ glorified not himself to be an high priest - That is, did not take this honour to himself, but received it from him who said, Thou art my Son, this day have I begotten thee - Not, indeed, at the same time; for his generation was from eternity. Psa 2:7.
5:1-10 The High Priest must be a man, a partaker of our nature. This shows that man had sinned. For God would not suffer sinful man to come to him alone. But every one is welcome to God, that comes to him by this High Priest; and as we value acceptance with God, and pardon, we must apply by faith to this our great High Priest Christ Jesus, who can intercede for those that are out of the way of truth, duty, and happiness; one who has tenderness to lead them back from the by-paths of error, sin, and misery. Those only can expect assistance from God, and acceptance with him, and his presence and blessing on them and their services, that are called of God. This is applied to Christ. In the days of his flesh, Christ made himself subject to death: he hungered: he was a tempted, suffering, dying Jesus. Christ set an example, not only to pray, but to be fervent in prayer. How many dry prayers, how few wetted with tears, do we offer up to God! He was strengthened to support the immense weight of suffering laid upon him. There is no real deliverance from death but to be carried through it. He was raised and exalted, and to him was given the power of saving all sinners to the uttermost, who come unto God through him. Christ has left us an example that we should learn humble obedience to the will of God, by all our afflictions. We need affliction, to teach us submission. His obedience in our nature encourages our attempts to obey, and for us to expect support and comfort under all the temptations and sufferings to which we are exposed. Being made perfect for this great work, he is become the Author of eternal salvation to all that obey him. But are we of that number?