‘For therein [in the gospel] is the righteousness of God revealed.’ Does it mean what seems obvious – that God is holy, the holiness of God is revealed? No, that is not what the phrase means.
Have you ever done that? Do you worship after a fashion, perhaps minimally? But you have never embraced him, trusted him with your life, come as a lost sinner, cried out for forgiveness and for new life. ‘I am not ashamed of the [good news of Christ] for it is the power of God unto salvation to everyone that believeth.’ Supposing I embrace Him, supposing I ask, supposing I come, and he doesn't receive me. But listen: ‘to everyone that believeth’; that is your warrant of faith. It’s your assurance he will receive you if you sincerely mean it with all your heart. ‘The gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek’, everyone worldwide, ‘for therein is the righteousness of God, that currency that He gives, the gift of righteousness, the life and death of Jesus Christ for sinners.
What is faith? I believe in God. I believe in Christ. I believe he suffered and died to make an atonement for me, and that he lived a perfect life in order to offer up his righteousness for me. I not only believe it and trust it, but I go a little further than that. Faith believes it enough to depend upon it. It believes the gospel enough to rest its soul upon it, to depend upon it and to embrace it. It is not adequate faith if you believe only enough to technically think that these things are right, that Christ came and died. You believe it enough to yield yourself to God, to repent of your sin, and to embrace this as the only way of salvation, and cry out for it to be yours.