'Christ as a prophet teaches by his Spirit, he likewise as a king subdues the heart by his Spirit to obedience to what is taught. This is that teaching which is promised of God, when not only the brain but the heart itself is taught; when men do not only know what they should do but are taught the very doing of it. They are not only taught that they should love, fear and obey, but they are taught love itself, and fear and obedience themselves. Christ sets up his throne in the very heart and alters its direction, so making his subjects good, together with teaching them to be good. Other princes can make good laws, but they cannot write them in their people's hearts (Jer. 31:33). This is Christ's perogative: he infuses into his subjects his own Spirit.'
Richard Sibbes, The Bruised Reed, p.87.