1. Hic enim erat Melchisedec rex Salem, pontifex Dei altissimi, qui occurrit Abrahae revertenti a caede regum, et benedixit illi;
2. To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace;
2. Cui et decimas ex omnibus impartitus est Abraham; qui primum quidem ex interpretatione dicitur Rex justitiae, deinde etiam Rex Salem, quod est Rex pacis;
3. Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually.
3. Sine patre, sine matre, sine genere, nec initium dierum, nec vitae finem habens; sed assimilatus Filio Dei manet sacerdos in perpetuum.
1. For this Melchisedec, etc. He has hitherto been stimulating the Jews by exhortations, that they might attentively consider the comparison between Christ and Melchisedec. At the end of the last chapter, that he might return from his digression to his subject, he quoted again the passage from the Psalms; and now he enters fully into what he had before slightly referred to; for he enumerates particularly the things connected with Melchisedec, in which he resembled Christ. It is indeed no wonder that he dwells so minutely on this subject. It was doubtless no common thing that in a country abounding in the corruptions of so many superstitions, a man was found who preserved the pure worship of God; for on one side he was nigh to Sodom and Gomorrah, and on the other to the Canaanites, so that he was on every side encompassed by ungodly men. Besides, the whole world was so fallen into impiety, that it is very probable that God was nowhere faithfully worshipped except in the family of Abraham; for his father and his grandfather, who ought to have retained true religion, had long before degenerated into idolatry. It was therefore a memorable fact, that there was still a king who not only retained true religion, but also performed himself the office of a priest. And it was doubtless necessary that in him who was to be a type of the Son of God all things excellent should be found: and that Christ was shadowed forth by this type is evident from the Psalm referred to; for David did not say without reason, "Thou art a priest forever after the order Melchisedec;" no, but on the contrary, by these words a sublime mystery was recommended to the Church.
Let us now consider each of those particulars in which the Apostle makes Christ like Melchisedec. 
The first likeness is in the name; for it was not without a mystery that he was called the King of righteousness. For though this honor is ascribed to kings who rule with moderation and in equity, yet this belongs really to Christ alone, who not only exercises authority justly as others do, but also communicates to us the righteous of God, partly when he makes us to be counted righteous by a gratuitous reconciliation, and partly when he renews us by his Spirit, that we may lead a godly and holy life. He is then called the King of righteousness, because of what he effects in diffusing righteousness on all his people.  It hence follows, that out of his kingdom nothing but sin reigns among men. And therefore Zechariah, when he introduces him, as by the solemn decree of God, into the possession of his kingdom, thus extols him, --
"Rejoice, O daughter of Sion, Behold thy righteous King cometh to thee," (Zechariah 2:10;)
intimating that the righteousness, which is otherwise wanting to us, is brought to us by the coming of Christ.
The second likeness which the Apostle states is as to the kingdom of peace. This peace indeed is the fruit of that righteousness which he has mentioned. It hence follows that wherever Christ's kingdom extends, there peace ought to be, as we find in Isaiah 2 and 9, and in other places. But as peace among the Hebrews means also a prosperous and happy state, it may be so taken here: yet I prefer to understand it here of that inward peace which tranquilizes the conscience and renders it confident before God. And the excellency of this blessing cannot be sufficiently estimated, unless you consider on the other hand, how miserable a thing it is to be tormented by constant inquietude; which must necessarily be the case until we have our consciences pacified by being reconciled to God through Christ.
3. Without father, etc. I prefer this rendering to that of "unknown father;" for the Apostle meant to express something more emphatic than that the family of Melchisedec was obscure or unknown. Nor does this objection disturb me, that the reality does not correspond with the figure or type, because Christ has a Father in heaven, and had a mother on earth; for the Apostle immediately explains his meaning by adding without descent, or kindred. He then exempts Melchisedec from what is common to others, a descent by birth; by which he means that he is eternal, so that his beginning from men was not to be sought after. It is indeed certain that he descended from parents; but the Apostle does not speak of him here in his private capacity; on the contrary, he sets him forth as a type of Christ. He therefore allows himself to see nothing in him but what Scripture contains. For in treating of things respecting Christ, such reverence ought to be observed as not to know anything but what is written in the Word of the Lord. Now, as the Holy Spirit in mentioning this king, the most illustrious of his age, is wholly silent as to his birth, and makes afterwards no record of his death, is not this the same thing as though eternity was to be ascribed to him? And what was shadowed forth in Melchisedec is really exhibited in Christ. It behooves us then to be satisfied with this moderate view, that while Scripture sets forth to us Melchisedec as one who had never been born and never died, it shows to us as in a mirror, that Christ has neither a beginning nor an end. 
But we hence also learn how much reverence and sobriety is required as to the spiritual mysteries of God: for what is not found read in Scripture the Apostle is not only willing to be ignorant of, but also would have us to seek to know. And surely it is not lawful for us to allege anything of Christ from our own thoughts. And Melchisedec is not to be considered here, as they say, in his private capacity, but as a sacred type of Christ; nor ought we to think that it was accidentally or inadvertently omitted that no kindred is ascribed to him, and that nothing is said of his death; but on the contrary, that this was done designedly by the Spirit, in order to give us an idea of one above the common order of men. There seems therefore to be no probability in the conjecture of those who say that Melchisedec was Shem the son of Noah; for if we make him to be some known individual, we destroy this third likeness between Melchisedec and Christ.
Made like, or assimilated, etc. Not as far as what was typified required; for we must always bear in mind that there is but an analogy between the thing signified and the sign; for they make themselves ridiculous who imagine that he came down from heaven, in order that there might be a perfect similarity. It is enough that we see in him the lineaments of Christ, as the form of the living man may be seen in his picture, while yet the man himself is very different from what represents him.  It seems not to be worth one's while to refute the delirious notions of those who dream that Christ himself, or the holy Spirit, or an angel, appeared at that time; unless indeed one thought it to be the duty of a rightminded man to dispute with Postillus and such fanatics; for that impostor asserts that he is Melchisedec with no less supercilious folly than those mad spirits of old, mentioned by Jerome, who pretended that they were Christ.
 The passage reads better, and the meaning appears more evident, when we consider was as understood in the first verse, as Calvin does. The first part refers to what he did as to Abraham: and the second, to what he was as a type of Christ. Now this Melchisedec, king of Salem, was a priest of the most high God; who met Abraham returning from the overthrow of the kings, and blessed him; to whom Abraham also divided the tenth of all: being first indeed, by interpretation, King of righteousness, and then also King of Salem, which is, King of Peace; without father, without mother, without decent, having no beginning of days or end of life, but By saying that he "blessed" Abraham, we are to render that he prayed God to bless him, as we find it explained in Genesis 14:19.  It is not as a king, but as a priest that Christ is our righteousness. Therefore strictly speaking, as a king, he administers righteousness, or acts righteously. "The king of righteousness," may be rendered, as Stuart does, a righteous king. See Psalm 45:7 -- Ed.  Some regard what is said of Melchisedec being without father, etc., as meaning that he was so in his office as a king and priest, there being no account of a predecessor or of a successor to him; but this view cannot be taken on account of these words, "without mother, without descent," etc., Calvin gives the explanation commonly received. -- Ed.  Our version "made like," etc., is objected to by Stuart; and he renders it, "being like," alleging that the Apostle's object is to show, not that Melchisedec was "made like" to Christ as a priest, but the contrary, according to Psalm 110:4. But the object here seems to be different: he shows why it is that there is no record of Melchisedec's office as to its beginning or end; it was that he might be made a fit type to represent the Son of God. -- Ed.
 It is not as a king, but as a priest that Christ is our righteousness. Therefore strictly speaking, as a king, he administers righteousness, or acts righteously. "The king of righteousness," may be rendered, as Stuart does, a righteous king. See Psalm 45:7 -- Ed.
 Some regard what is said of Melchisedec being without father, etc., as meaning that he was so in his office as a king and priest, there being no account of a predecessor or of a successor to him; but this view cannot be taken on account of these words, "without mother, without descent," etc., Calvin gives the explanation commonly received. -- Ed.
 Our version "made like," etc., is objected to by Stuart; and he renders it, "being like," alleging that the Apostle's object is to show, not that Melchisedec was "made like" to Christ as a priest, but the contrary, according to Psalm 110:4. But the object here seems to be different: he shows why it is that there is no record of Melchisedec's office as to its beginning or end; it was that he might be made a fit type to represent the Son of God. -- Ed.