Faith, not works, not our command-keeping. Faith isn't a work. It isn't something good that we do. It isn't a decision we've made or a good quality in our character. Faith is trust in God's promise, being sure of what we hope for.
Faith receives the promise as the thing itself.
It is the reality of what is hoped for but not yet possessed. When God speaks, things happen. His Word is powerful. It does what it says. Faith is the certainty of what is not seen.