See that your chief study be about heart, that there God’s image may be planted, and his interest advanced, and the interest of the world and flesh subdued, and the love of every sin cast out, and the love of holiness succeed; and that you content not yourselves with seeming to do good in outward acts, when you are bad yourselves, and strangers to the great internal duties. The first and great work of a Christian is about his heart.
