I press toward the mark - As he who was running a race did. The "mark" means properly the object set up at a distance at which one looks or aims, and hence the goal, or post which was set up at the end of a race-course, and which was to be reached in order that the prize might be won. Here it means that which is at the end of the Christian race - in heaven.
For the prize - The prize of the racer was a crown or garland of olive, laurel, pine, or apple; see the notes at 1-Corinthians 9:24. The prize of the Christian is the crown that is incorruptible in heaven.
Of the high calling of God - Which is the end or result of that calling. God has called us to great and noble efforts; to a career of true honor and glory; to the obtainment of a bright and imperishable crown. It is a calling which is "high," or "upward" - (ἄνω anō) - that is, which tends to the skies. The calling of the Christian is from heaven, and to heaven; compare Proverbs 15:24. He has been summoned by God through the gospel of the Lord Jesus to secure the crown. It is placed before and above him in heaven. It may be his, if he will not faint or tire or look backward. It demands his highest efforts, and it is worth all the exertions which a mortal can make even in the longest life.

I press toward the mark - Κατα σκοπον διωκω· I pursue along the line; this is a reference to the white line that marked the ground in the stadium, from the starting place to the goal, on which the runners were obliged to keep their eye fixed; for they who transgressed or went beyond this line did not run lawfully, and were not crowned, even though they got first to the goal. See the concluding observations on 1-Corinthians 9:27.
What is called σκοπος, mark or scope, here, is called κανων, the line, i.e. the marked line, Philippians 3:16. When it was said to Diogenes, the cynic, "Thou art now an old man, rest from thy labors;" to this he answered: Ει δολιχον εδραμον, προς τῳ τελει εδει με ανειναι, και μη μαλλον επιτειναι; "If I have run long in the race, will it become me to slacken my pace when come near the end; should I not rather stretch forward?" Diog. Laert., lib. vi. cap. 2. sec. 6.
For the prize of the high calling of God - The reward which God from above calls me, by Christ Jesus, to receive. The apostle still keeps in view his crown of martyrdom and his glorious resurrection.

I press toward the mark,.... The allusion is to the white line, or mark, which the runners in the Olympic games made up to, and to which he that came first received the prize; and by which the apostle intends the Lord Jesus Christ, who is "the scope", or "mark", of all the thoughts, purposes, and counsels of God, to which they all aim, and in which they all centre; and of the covenant of grace of which he is the sum and substance, the Mediator, surety, and messenger, in whom are all the blessings and promises of it; and of the Scriptures of truth, the writings of the Old and New Testament, which all testify of him, and agree in him; and of both law and Gospel, he is the end of the law, and the substance of the Gospel; and of all the graces of the Spirit, in the hearts of his people, faith looks at him, hope is concerned with him, and love has him for its object; and of all the duties believers are concerned in, they all point at him, they are done in his name and strength, through faith in him, and from a principle of love to him, and with a view to his glory; and so he is of their thoughts, affections, and desires: and to this mark they press, or "run", as the Syriac version renders it; they look to Jesus, while they are running their Christian race; they keep him in their view, and follow after him, because he is their forerunner, Hebrews 6:20, and the Captain of their salvation, Hebrews 2:10; they set him before them as their guide to direct them, according to whom they steer their course, that so they may not lose their way, nor move out of it, to the right hand or the left; and from whom they take great encouragement to go on, and press through the difficulties they do; and besides, they know that there is no coming at the prize, but through the mark, for there is salvation in no other, Acts 4:12; and that whoever comes up to the mark, or believes in Christ, shall enjoy the prize of eternal life, which is next mentioned:
for the prize of the high calling of God in Christ Jesus: by which is meant, the incorruptible crown; the crown of life, righteousness, and glory, that fadeth not away, James 1:12, styled "the prize of the calling of God"; because it is what God in the effectual calling calls his people to, even to a kingdom and glory, and to eternal glory and happiness; of which they have a sight, though but a glimmering view of it, and are blessed with hope in it; in which they rejoice, and see their right unto it, in the righteousness of Christ, and have a meetness for it: this is named "the high calling of God", because God is on high, who calls them to it, in allusion to the judge in the Olympic games, who was placed in an exalted situation, near the mark, with the crown in his hand, which he gave to him that came first; and because the grace by which the saints are called is from above, as every good and perfect gift is, James 1:17; and because the prize they are called unto consists of things above, where Jesus is, and is the hope laid up in heaven, Colossians 1:5, and the inheritance reserved there, 1-Peter 1:4; and expresses the great honour and dignity of called ones, who are called to a crown and kingdom, are raised from the dunghill, to sit among princes, and to inherit the throne of glory, and are made kings and priests unto God: and may also denote, that the calling to such high honour is from above, and not below; and is owing to the special grace and favour of God, and not to any merits of men; nor is the prize to which they are called, of him that willeth and runneth, but of God's grace and mercy, Romans 9:16, and moreover, this calling is said to be "in Christ Jesus"; for both the purpose and grace, according to which men are called, are in him; the grace by which they are called, and which is implanted in them when called, is all in and from Christ; the blessings of grace, which they then in person enjoy, are spiritual blessings in him; and even the glory they are called unto is in his hands; not only the promise of eternal life, but that itself; the gift of it is with him, and it comes through him; yea, they are called by him, and said to be the called of Christ Jesus; now the prize of this calling, which is what God has prepared from all eternity, which Christ has in his hands, and will give to all his, and which is of immense richness and eternal duration, and shall be bestowed on all Christian runners, or true believers, is what the apostle was pressing for, pursuing after, with much difficulty, through great toil and labour, diligent searching of the Scriptures, frequent wrestling with God in prayer, and constant attendance on the means of grace, and ordinances of the Gospel.

high calling--literally, "the calling that is above" (Galatians 4:26; Colossians 3:1): "the heavenly calling" (Hebrews 3:1). "The prize" is "the crown of righteousness" (1-Corinthians 9:24; 2-Timothy 4:8). Revelation 2:10, "crown of life." 1-Peter 5:4, "a crown of glory that fadeth not away." "The high," or "heavenly calling," is not restricted, as ALFORD thinks, to Paul's own calling as an apostle by the summons of God from heaven; but the common calling of all Christians to salvation in Christ, which coming from heaven invites us to heaven, whither accordingly our minds ought to be uplifted.

Forgetting the things that are behind - Even that part of the race which is already run. And reaching forth unto - Literally, stretched out over the things that are before - Pursuing with the whole bent and vigour of my soul, perfect holiness and eternal glory. In Christ Jesus - The author and finisher of every good thing.