The true, living, gracious God did not need to be manipulated or bought off. His favor came to people by his grace. And just as the jailer discovered, he wanted nothing more than their faith. And even that was not a matter of his need, but of our blessing. For to believe in his goodness, grace, love, and salvation aligns us with the gifts he offers. We're saved by faith because the gift is already there. Faith receives it.
I'm certain I don't often enough give thanks to God for my faith, for his salvation, for coming to me, for showing me himself. This jailer and his family are good reminders and examples for us all.