A people in covenant with God are a willing people; though they cannot serve God perfectly, they serve him willingly. They do not grudge God a little time spent in his worship; they do not hesitate or murmur at sufferings; they will go through a sea and a wilderness, if God call. ‘Thy people shall be a willing people:’ Psalm 110:3: ‘a people of willingness.’ Heb. This spontaneity and willingness is from the attractive power of God’s Spirit: the Spirit does not impellere, force, but trahere, sweetly draws the will; and this willingness in religion makes all our services accepted. God does sometimes accept of willingness without the work, but never the work without willingness.
– Watson, A Body of Divinity, p. 157.