Daily employing the Spirit and new nature

Not to be daily employing the Spirit and new nature for the mortifying of sin, is to neglect that excellent succour which God hath given us against our greatest enemy. If we neglect to make use of what we have received, God may justly hold his hand from giving us more. His graces, as well as his gifts, are bestowed on us to use, exercise and trade with. Not to be daily mortifying sin is to sin against the goodness, kindness, wisdom, grace and love of God, who hath furnished us with a principle of doing it.

-John Owen, from The Mortification of Sin