5:5 {7} Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?
(7) Moreover he declares two things, the one, what true faith is, that is, that which rests on Jesus Christ the Son of God alone: on which follows the other, that is, that this strength is not proper to faith, but by faith as an instrument is drawn from Jesus Christ the Son of God.
5:5 Who is he that overcometh the world? Only the men of faith; those who believe upon Jesus Christ.
5:5 Who is he that overcometh the world - That is superior to all worldly care, desire, fear? Every believer, and none else. The seventh verse 1Jo 5:7 (usually so reckoned) is a brief recapitulation of all which has been before advanced concerning the Father, the Son, and the Spirit. It is cited, in conjunction with the sixth and eighth, 1Jo 5:6,8 by Tertullian, Cyprian, and an uninterrupted train of Fathers. And, indeed, what the sun is in the world, what the heart is in a man, what the needle is in the mariner's compass, this verse is in the epistle. By this the sixth, eighth, and ninth verse s 1Jo 5:6,8,9 are indissolubly connected; as will be evident, beyond all contradiction, when they are accurately considered.
5:1-5 True love for the people of God, may be distinguished from natural kindness or party attachments, by its being united with the love of God, and obedience to his commands. The same Holy Spirit that taught the love, will have taught obedience also; and that man cannot truly love the children of God, who, by habit, commits sin or neglects known duty. As God's commands are holy, just, and good rules of liberty and happiness, so those who are born of God and love him, do not count them grievous, but lament that they cannot serve him more perfectly. Self-denial is required, but true Christians have a principle which carries them above all hinderances. Though the conflict often is sharp, and the regenerate may be cast down, yet he will rise up and renew his combat with resolution. But all, except believers in Christ, are enslaved in some respect or other, to the customs, opinions, or interests of the world. Faith is the cause of victory, the means, the instrument, the spiritual armour by which we overcome. In and by faith we cleave to Christ, in contempt of, and in opposition to the world. Faith sanctifies the heart, and purifies it from those sensual lusts by which the world obtains sway and dominion over souls. It has the indwelling Spirit of grace, which is greater than he who dwells in the world. The real Christian overcomes the world by faith; he sees, in and by the life and conduct of the Lord Jesus on earth, that this world is to be renounced and overcome. He cannot be satisfied with this world, but looks beyond it, and is still tending, striving, and pressing toward heaven. We must all, after Christ's example, overcome the world, or it will overcome us to our ruin.