Shall we give men new motives, or ask God to give them a new power? Shall we improve the world, or pray God to create a new world? The former alternatives have been tried and found wanting . . . good motives are powerless when the heart is evil. Struggle as we may, we remain just a part of this world until, by faith, we cry: 'Not by might, nor by power, but by Thy Spirit, O Lord of Hosts.'
--J. Gresham Machen, What is Faith, 218
And I will give you a new heart, and a new Spirit I will put with in you . . .