From Michael Horton and the White Horse Inn, dealing with antinomianism:
The danger of legalism becomes apparent not only when we confuse law and gospel in justification, but when we imagine that even our new obedience can be powered by the law rather than the gospel. The law does what only the law can do: reveal God’s moral will. In doing so, it strips us of our righteousness and makes us aware of our helplessness apart from Christ and it also directs us in grateful obedience. No one who says this can be considered an antinomian. However, it’s not a matter of finding the right “balance” between law and gospel, but of recognizing that each does different work. We need imperatives—and Paul gives them. But he only does this later in the argument, after he has grounded sanctification in the gospel.
The ultimate antidote to antinomianism is not more imperatives, but the realization that the gospel swallows the tyranny as well as the guilt of sin. It is enough to save Christians even in their failure and not only brings them peace with God in justification, but the only liberation from the cruel oppression of sin. To be united to Christ through faith is to receive everything that we need not only to challenge legalism but antinomianism as well.