21But now, apart from law, the righteousness of God has been disclosed, and is attested by the law and the prophets, 22the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction, 23since all have sinned and fall short of the glory of God;24they are now justified by his grace as a gift, through the redemption that is in Christ Jesus, 25whom God put forward as a sacrifice of atonement by his blood, effective through faith. He did this to show his righteousness, because in his divine forbearance he had passed over the sins previously committed; 26it was to prove at the present time that he himself is righteous and that he justifies the one who has faith in Jesus. (Romans 3:21-26, NRSV)
We have all fallen short of what God expects from us, there is no exception to that we are all sinners and deserve to be separated from God, but God gave us Jesus to make a way for us to be redeemed. Because of His righteousness, we are justified to God.
So if we believe that what the Bible says is true then the promise is true for us. If we believe and have faith in the life, death, and resurrection of Jesus, we are justified by God.
It is all God’s doing and nothing we do that justifies us.