And being made perfect, or sanctified, etc. Here is the ultimate or the remoter end, as they call it, why it was necessary for Christ to suffer: it was that he might thus become initiated into his priesthood, as though the Apostle had said that the enduring of the cross and death were to Christ a solemn kind of consecration, by which he intimates that all his sufferings had a regard to our salvation. It hence follows, that they are so far from being prejudicial to his dignity that they are on the contrary his glory; for if salvation be highly esteemed by us, how honorably ought we to think of its cause or author? For he speaks not here of Christ only as an example, but he ascends higher, even that he by his obedience has blotted out our transgressions. He became then the cause of salvation, because he obtained righteousness for us before God, having removed the disobedience of Adam by an act of an opposite kind, even obedience. Sanctified suits the passage better than "made perfect." The Greek word teleiotheis means both; but as he speaks here of the priesthood, he fitly and suitably mentions sanctification. And so Christ himself speaks in another place, "For their sakes I sanctify myself." (John 17:19.) It hence appears that this is to be properly applied to his human nature, in which he performed the office of a priest, and in which he also suffered. [1] To all them that obey him. If then we desire that Christ's obedience should be profitable to us, we must imitate him; for the Apostle means that its benefit shall come to none but to those who obey. But by saying this he recommends faith to us; for he becomes not ours, nor his blessings, except as far as we receive them and him by faith. He seems at the same time to have adopted a universal term, all, for this end, that he might show that no one is precluded from salvation who is but teachable and becomes obedient to the Gospel of Christ.

Footnotes

1 - The word teleiotheis, means here the same as in chapter 2:10. Stuart gives it the same meaning here as in the former passage, "Then when exalted to glory," etc.; but this does not comport with what follows, for it was not his exaltation to glory that qualified him to be "the author (or the causer or effecter) of eternal salvation," but his perfect or complete work in suffering, by his having completely and perfectly performed the work of atonement. And that his suffering in obedience to God's will, even his vicarious suffering, is meant here, appears also from the following reference to his being a priest after the order of Melchisedec. The meaning then seems to be, that Christ having fully completed his work as a priest, and that by suffering, became thereby the author of eternal salvation. -- Ed

And being made perfect - That is, being made a "complete" Saviour - a Saviour suited in all respects to redeem people. Sufferings were necessary to the "completeness" or the "finish" of his character as a Saviour, not to his moral perfection, for he was always without sin; see this explained in the notes on Hebrews 2:10.
He became the author - That is, he was the procuring cause (αἴτιος aitios) of salvation. It is to be traced wholly to his sufferings and death; see the note, Hebrews 2:10. "Unto all them that obey him." It is not to save those who live in sin. Only those who "obey" him have any evidence that they will be saved; see the note, John 14:15.

And being made perfect - Και τελειωθεις· And having finished all - having died and risen again. Τελειωθηναι signifies to have obtained the goal; to have ended one's labor, and enjoyed the fruits of it. Hebrews 12:23 : The spirits of just men made perfect, πνευμασι δικαιων τετελειωμενων, means the souls of those who have gained the goal, and obtained the prize. So, when Christ had finished his course of tremendous sufferings, and consummated the whole by his death and resurrection, he became αιτιος σωτηριας αιωνιου, the cause of eternal salvation unto all them who obey him. He was consecrated both highs priest and sacrifice by his offering upon the cross.
"In this verse," says Dr. Macknight, "three things are clearly stated:
1. That obedience to Christ is equally necessary to salvation with believing on him.
2. That he was made perfect as a high priest by offering himself a sacrifice for sin, Hebrews 8:3.
3. That, by the merit of that sacrifice, he hath obtained pardon and eternal life for them who obey him."
He tasted death for every man; but he is the author and cause of eternal salvation only to them who obey him. It is not merely believers, but obedient believers, that shall be finally saved. Therefore this text is an absolute, unimpeachable evidence, that it is not the imputed obedience of Christ that saves any man. Christ has bought men by his blood; and by the infinite merit of his death he has purchased for them an endless glory; but, in order to be prepared for it, the sinner must, through that grace which God withholds from no man, repent, turn from sin, believe on Jesus as being a sufficient ransom and sacrifice for his soul, receive the gift of the Holy Ghost, be a worker together with him, walk in conformity to the Divine will through this Divine aid, and continue faithful unto death, through him, out of whose fullness he may receive grace upon grace.

(5) And being made (k) perfect, he became the author of eternal salvation unto all them that obey him;
(5) The other part of the first comparison: Christ was consecrated by God the Father as the author of our salvation, and an High Priest for ever, and therefore he is a man, though nonetheless he is far above all men.
(k) See (Hebrews 2:10).

And being made perfect,.... In his obedience, through sufferings; having completed his obedience, gone through his sufferings, and finished his sacrifice, and being perfectly glorified in heaven:
he became the author of eternal salvation unto all them that obey him; the salvation Christ is the author of is "eternal"; it was resolved upon from eternity, and contrived in it; it was secured in the everlasting covenant, in which not only a Saviour was provided, but blessings both of grace and glory: and it is to eternity; and stands distinguished from a temporal salvation, and is opposed to eternal damnation; it is the salvation of the soul, which is immortal; and it takes in both grace and glory, which are of a durable nature; and the continuance of it is owing to the abiding and lasting virtue of Christ's person, blood, and righteousness: and Christ is the cause or author of this salvation, by his obedience and sufferings; by obeying the precept, and bearing the penalty of the law; by the price of his blood, and by the power of his arm; by his death and by his life; by his sacrifice on the cross, and by his intercession in heaven; by bestowing grace here, and glory hereafter: this shows that salvation is done, and that Christ is the sole author of it, and that all the glory of it should be given to him; and those to whom he is the author of salvation, are such as hearken to the voice of his Gospel, and obey hin in his ordinances. Christ is not the author of salvation to all men; all men do not obey him; all those whom Christ saves, he brings them to an obedience to himself; for his obedience for them does not exempt them from obedience to him, though their obedience is no cause of their salvation; Christ himself is the alone author of that.

made perfect--completed, brought to His goal of learning and suffering through death (Hebrews 2:10) [ALFORD], namely, at His glorious resurrection and ascension.
author--Greek, "cause."
eternal salvation--obtained for us in the short "days of Jesus' flesh" (Hebrews 5:7; compare Hebrews 5:6, "for ever," Isaiah 45:17).
unto all . . . that obey him--As Christ obeyed the Father, so must we obey Him by faith.

And being perfected - By sufferings, Hebrews 2:10; brought through all to glory. He became the author - The procuring and efficient cause. Of eternal salvation to all that obey him - By doing and suffering his whole will.