If you declare 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 profess your faith and are saved. (Romans 10:9-10)
To justify is to declare righteous, to make one right with God. Justification is God’s declaring those who receive Christ to be righteous, based on Christ’s righteousness being imputed to the accounts of those who receive Christ.
You are saved in the profession of your heart and justified in the righteousness received in Christ. Justification and salvation come from your heart. Being saved is much more than words spoken when prompted. Salvation is evident from a changed heart and the love that grows from it. People can say anything, but the condition of their heart is what speaks to the Father. Their heart is what has to receive Jesus Christ as their Savior and Lord. “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but the one who does the will of my Father who is in heaven. On that day many will say to me, ‘Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?’ And then will I declare to them, ‘I never knew you; depart from me, you workers of lawlessness.’ (Matthew 7:21-23) The will of the Father is to love Him with all your heart and your neighbor as yourself. It is the love of a changed heart that truly allows a believer to walk in the salvation of Jesus Christ. The knowledge of Jesus has to fall from your head to your heart where is can grow and blossom into spiritual fruit.
Let your faith come from more than words. Ask God to let His grace and mercy fill your heart. Let the indwelling of the Spirit which comes through receiving Jesus change your heart in a way that magnifies God through you. Let the words of your mouth reflect the condition of your changed heart and not the content of your mind. The deceiver looks to plant seeds into your mind, but your heart belongs to your Savior. Your heart is the source of your salvation and relationship with God.