Works

The efficient cause of our salvation is God the Father's love; the material cause is God the Son's obedience; the instrumental cause is the Spirit's illumination (that is, faith); the final cause is the glory of God's great generosity; and those whom the Lord has destined by his mercy for the inheritance of eternal life he leads into possession of it (according to his ordinary dispensation) by the inferior causes of good works.

—John Calvin, Institutes, 3:14:21.

In other words, works are not what we do for God but what he does for us.