“The comfort of our souls much depends upon the keeping of our hearts; for he that is negligent in attending to his own heart, is, ordinarily, a great stranger to assurance, and the comforts following from it. Indeed if the Antinomian doctrine were true, which teaches you to reject all marks and signs for the trial of your condition, telling you that it is the Spirit that immediately assures you, by witnessing your adoption directly, without them; then you might be careless of your hearts, yea, strangers to them, and yet no strangers to comfort: but since both Scripture and experience confute this, I hope you will never look for comfort in this unscriptural way.”
John Flavel from Keeping the Heart