The true meaning of Romans 10:9-10 is twisted to prove the pretended salvation of Christians, 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. For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation.
To confess, is to acknowledge Jesus is our Lord, who controls our deeds – this only happens as we become obedient to the word (Jesus) in our heart and mouth, which is the word of faith the Apostles preached, Rom 10:8; The beginning obedience is evidence of our belief in Jesus and our subjection to His commands as the rightful Lord.
And if we persist in obedient faith to the end, making every effort, we will be saved (delivered from all sins, washed, cleansed, purified, perfected, sanctified, made holy), by the power of God working mightily in us.
We don’t become righteous by saying that Jesus is Lord. We only become righteous when we become controlled by His spirit through our words and deeds; then and only then, can we truthfully say Jesus is Lord (of us, by our obedience to His controlling commands). As we wait in faith for the hope of righteousness, our obedience leads to righteousness. Gal 5:5, Rom 6:16.
Salvation is not saying Jesus is Lord or pointing to scripture – it is to be experienced. Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new.