8 But what does it say? “The word is near you, in your mouth and in your heart” (that is, the word of faith which we preach): 9 that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. 10 For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. (Romans 10:8–10, NKJV)
The gospel is the “word of faith” the apostles preached. It is near, having been confessed by our mouths and believed in our hearts. The gospel of Christ is the message of “righteousness of faith,” not “righteousness of the law” (Rom. 10:4-7). But please see that the word of faith (gospel) is not a message of salvation by faith only, since “confession with your mouth” is belief plus confession. We are neither saved by faith alone or by confession alone. Both are said to be “unto” righteousness or salvation (v. 10). The preposition “unto” translates the Greek word eis, which denotes “entrance into, or direction and limit: into, to, towards, for, among” (Thayer, 183). Believing the gospel in your heart and confessing Christ with your mouth move you toward salvation, but they are not all the gospel says to be saved. The word of faith commands us to repent or perish (Lk. 13:3, 5; Acts 17:30). The word of faith also commands us to be baptized “for (eis) the remission of sins” (Acts 2:38). Let us believe and follow all the gospel preached by the apostles. Then we have God’s assurance of being saved in Christ.