“And this is the victory that has overcome the world — our faith.” (1 John 5:4b ESV)
As the Apostle John winds up his letter, he develops a climax that ties together the integral parts of his exhortation. Remember, the purpose of the book is to help believers know they have eternal life (1 John 5:13). Also, recall that the way in which believers will attain this assurance can be divided into two categories: the objective foundation and the subjective evidences. The objective foundation is centered in Jesus Christ; Christ alone is the sum and source of our salvation and all of our doubts ought to be brought into submission to his nature, love, and authority. The subjective evidences involve a desire to love the brethren and obey God’s commands. How do these two strands of the cord of assurance connect? By faith.
For a sinner to receive the forgiveness that is offered in Christ alone, he must believe the gospel by faith. For a believer to find assurance that he indeed is a child of God, he must look to Christ by faith. For a child of God to desire to obey God’s commands, he must rely on God by faith. For believers to obey God’s command to love one another, they must deny themselves by faith.
Seeing faith as the connection between love and obedience puts the First Epistle of John into a more clear perspective. When John says, “Everyone who believes that Jesus is the Christ has been born of God” he is not saying a mere mental assent to the facts of Jesus’ life assures someone of salvation. Rather, when we see saving, living faith as that which involves new desires to obey God and to love the brethren, then “faith” is a complete package, a beautiful picture of a redeemed life.
This kind of faith overcomes the world. The world that is hostile to the gospel, that would desire to call us away from God, that stands in opposition to everything offered by God, cannot have victory over the child of God. No, the victory belongs to God’s people, who are given all they need to overcome the world through Christ by faith.