As I explained...coming to Christ, accepting him as Lord, is not done without the person knowing anything about it.
He has accepted Christ as his spiritual leader and so he naturally aspires to live in accordance with Christ's own instructions to mankind. It's ridiculous to think that the convert would not want to follow in the way that his leader taught followers to live.
Were the person NOT want to do that, we all would question whether his "conversion" was genuine...or just words.
Yes, he necessarily knows-faith is
based on knowledge. But that's not the question. Depending on theology fallen man is totally depraved, unable to even assent to God, let alone move himself towards Him, nothing much more than a worthless sinner lacking any personal righteousness. And, of course, even faith is a supernatural gift, something he couldn't obtain of the kind or quality God requires without His help, without grace. And the doctrine of Sola Fide maintains that man is strictly
declared or imputed to be righteous at justification, so he still lacks any personal righteousness after justification, pretty much a snow-covered dung-heap at that point I guess. In Catholicism, OTOH, he's translated into a new creation, not only cleansed and forgiven of sin but also given the virtues of faith, hope, and love, even if in a more or less seedling form in need of being exercised, expressed, tested, nurtured, and grown. More is expected of those given more, including receiving more time within which to work out his salvation now. And sin will still be struggled with but expected to be overcome in the overall sense, especially when it comes to most serious offenses, persistence in acts intrinsically opposed to love of God and neighbor.
Either way the question arises, how and why would a personally unrighteous person act righteously? I believe Luther may have said that it would be done in
gratitude but even that would seem to be an unlikely response for a still unrighteous person-and not really the kind of motivation that would cause a person to regularly desire to feed the hungry, clothe the naked, comfort the sorrowful or even proclaim the gospel with any true zeal. It seems to me that, beginning with faith, man is already assenting, already making his first move towards real righteousness with that act, and then continues to do so with the help of further grace during his entire walk with God throughput his life...or
not.