'The heart of man is his worst part before it is regenerated, and the best afterward; it is the seat of principles, and the foundation of actions. The eye of God is, and the eye of the Christian ought to be, principally fixed upon it.
The greatestes difficulty in conversion is to win the heart to God; and the greatest difficulty after conversion is to keep the heart with God.'
John Flavel, Keeping the Heart: How to maintain your love for God, p.7.
