Ok. Faith is the beginning. It pleases God immensely because in finally places us into right stead and order with Him, and in a basic harmony with the universe/creation. To believe in God’s existence, alone, is profound, even if creation declares this by virtue of its beauty and order and complexity. But while that kind of reasoning gives “motives of credibility”, we certainly cannot come to believe in the God whom Christ revealed apart from grace: a God of goodness, mercy, trustworthiness, gentleness, patience, love. And while Paul and James treat faith, hope, and love as separate items, separate virtues, there are certainly stirrings of all three already in our first encounters with God, as we turn in faith to Him. Some historical teachings I’m familiar with identify those virtues as the basic supernatural gifts given, with faith being intellectual assent, hope meaning trust and even confidence in God’s promises, and love being the ultimate definition of righteousness for man, that which perfects and truly binds us to Him and would guarantee obedience. If Adam had it in Eden, obedience would’ve flowed naturally. He wasn’t ready yet.
Anyway, we often combine the virtues, especially faith and hope, and that's fine but ultimately full-blown love is the goal. God’s purposes are more than simply to place a number of otherwise worthless wretches in heaven, and damn the rest, but to produce something, something great, something better than He began with. And that something is produced as we participate in it, all three gifts also being human choices. In a created being made in God’s image, possessing free will, only love can finally guarantee order and peace and sinlessness in God’s creation.
Why should it have anything to do with the law?