It is, you see all the flock, or every individual member of our charge. To this end it is necessary, that we should know every person that belongeth to our charge; for how can we take heed to them, if we do not know them? We must labour to be acquainted, not only with the persons, but with state of all our people, with their inclinations and conversations; what are the sins of which they are most in danger, and what duties they are most apt to neglect, and what temptations they are most liable to; for if we know not their temperament or disease, we are not likely to prove successful physicians.'
Richard Baxter, The Reformed Pastor, p.90.