He who advises a sick man, whose manner of life is prejudicial to health, is clearly bound first of all to change his patient's manner of life.
PlatoTrue opinions are a fine thing and do all sorts of good so long as they stay in their place; but they will not stay long. They run away from a man's mind, so they are not worth much until you tether them by working out the reason. Once they are tied down, they become knowledge, and are stable.
Plato