The biggest heresy in church - Nicolás Barroso

Is the sinner's prayer 100% biblical? What does the Bible say about declaring with the mouth?

According to the Word of God, it is not enough to say that Jesus is our Lord; that is just the beginning! We must live a life that backs up that declaration if we do not want to be included among those of whom Jesus said: 'These people honor me with their lips, but their hearts are far from me. They worship me in vain; their teachings are merely human rules.' Matthew 15:8-9."