Romans 10:9-10 - confess with your mouth, "Jesus is Lord," and believe in your heart

That if you confess with your mouth, "Jesus is Lord,"and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved.

That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.

Romans 10:9-10

Commentary

confess .. the Lord Jesus. Not a simple acknowledgment that He is God and the Lord of the universe, since even demons acknowledge that to be true (James 2:19). This is the deep personal conviction, without reservation, that Jesus is that person's own master or sovereign. This phrase includes repenting from sin, trusting in Jesus for salvation, and submitting to Him as Lord. This is the volitional element of faith.
God has raised Him from the dead. Christ's resurrection was the supreme validation of His ministry (cf. John 2:18-21). Belief in it is necessary for salvation because it proved that Christ is who He claimed to be and that the Father had accepted His sacrifice in the place of sinners (4:24; cf. Acts 13:32, 33; 1 Pet. 1:3, 4). Without the resurrection, there is no salvation (1 Cor. 15:14-17).

MacArthur, J. J. (1997, c1997). The MacArthur Study Bible (electronic ed.) (Ro 10:9). Nashville: Word Pub.

"Confess"

"Confess" is the Greek word homologeōg, meaning "to declare the same thing." Therefore, the confession that leads to salvation is that which agrees with God in His judgment concerning man and His remedy for man in Christ. Confession of Jesus as Lord is one of the earliest Christian confessions of faith. To acknowledge Jesus as Lord certainly involves: (1) a recognition of His deity: Lord (kurios, Gk.) is often used to translate the name of God in the O.T. (Yahweh); (2) a recognition of His ability to save; and (3) an acknowledgement of His sovereign right as God-Savior to demand obedience to Himself in all things. The idea of personally trusting Him is involved.

Believer's Study Bible. 1997, c1995. C1991 Criswell Center for Biblical Studies. (electronic ed.) (Ro 10:2). Nashville: Thomas Nelson.