The point I am making through my round-about way of doing it is that repentance is a work. Don't get me wrong. It is a good work and we all should do it whenever we get into strife. Obedience to the commands of Christ are good works as well, and we are much better off by complying with them. I have no contention about that at all.
But these are works, and they do not please God or make us acceptable to Him. There will be many who will say, 'Lord, Lord" and try to justify themselves by their good works. Prophecy, casting out demons, doing great things for God are really good works and the more we do for God the better! But we cannot use those to be justified.
We need to accept God's grace and mercy and allow Him to accept us while we are vile, evil sinners deserving of Hell. Someone said, "Everything short of Hell is by God's grace". Everything we are and have, living in the world around us, is all by God's grace. We never earned it. The Scripture asks, "What have you got that you never received?"
The Cross and Resurrection kills our pride and stops us thinking we are something when we are nothing. We come as we are, in all our sins and filthiness and find grace and mercy and full acceptance. Zack found that out when Jesus came to lunch and accepted him in spite of what he was. Jesus ate with him, which was a social evil in Israel for a self-respecting Jew to do. Jesus ate and socialised with drunks, sinners, and prostitutes, before they repented and reformed. He accepted them as they were. That is the gospel of Christ.
We turn to Christ in our sinfulness, and He accepts us, forgives and cleanses us, and fills us with the Holy Spirit. Just think of that! The Holy Spirit coming to dwell in a vile, evil, sinful body! How much love does that take?? I say, infinite love!
Once that happens, then we can repent and obey the commands of Christ out of sheer gratitude for what He has done for us. We have a new heart and spirit and all we want to do is to glorify Christ in our lives. It is not to please God any more than his pleasure in us already. He rejoiced along with the angels when we first turned to Christ, and our turning to Christ pleased Him immensely, because here is another soul rescued from the kingdom of darkness, and it shows Satan's utter defeat because he could not stop that soul from escaping his clutches.
That's what I believe is salvation by faith in Christ alone.