The goal of this command is love, which comes from a pure heart and a good conscience and a sincere faith.
The whole point of what we’re urging is simply love—love uncontaminated by self-interest and counterfeit faith, a life open to God.
Once and for all, I give you this one short command: love, and do what you will. If you hold your peace, hold your peace out of love. If you cry out, cry out in love. If you correct someone, correct them out of love. If you spare them, spare them out of love. Let the root of love be in you: nothing can spring from it but good. …
Augustine’s quote is taken to mean that one can do whatever they feel like and want to do if they love God. But that’s not precisely what Augustine meant, and can open us up to misunderstanding. His point in the context of his sermon was that whatever we do is to be done out of love. Love for God and love for neighbor flowing together. As revealed in Christ in his fulfillment of God’s will. And then everything we do if done in that way will be good.
I think a good way to assess our actions and thoughts, indeed the fruit of our lives is to ask ourselves whether love for God and for our neighbor is our motivation and animating impulse, what moves us. If so, then we’re living in God’s grace as God intends for us in Christ. If not, then we’re living in something else, foreign to that grace. Sometimes we may simply be struggling to accept God’s love and then live in that love at all. God understands those times. We should still try to love, even when the sense of it is far removed from us. But make no mistake, the God who is love as John points out elsewhere and Paul as well, wants us to live in love, in everything we think, do and say. In and through Jesus.