Now, I want you to consider how important the Doctor is to you. Nobody needs him so much as the poor and laboring man. He is often ill. He is exposed to hunger and wet and cold, and to fever, and to all the diseases of hard labor and poverty. His work is heavy, and his heart is often heavy, too, with misery of all kinds,--his heart weary with its burden,--his hands and limbs often meeting with accidents,--and you know if the poor man, if one of you falls ill and takes fever, or breaks his leg, it is a far more serious thing than with a richer man. Your health and strength are all you have to depend on; they are your stock-in-trade, your capital. Therefore I shall ask you to remember _four things_ about your duty to the Doctor, so as to get the most good out of him, and do the most good to him too. _1st_, It is your duty to trust the Doctor; _2dly_, It is your duty to obey the Doctor; _3dly_, It is your duty to speak the truth to the Doctor, the whole truth, and nothing but the truth; and, _4thly_, It is your duty to reward the Doctor. And so now for the _first_. It is your duty to _trust_ the Doctor, that is, to believe in him. If you were in a ship, in a wild storm, and among dangerous rocks, and if you took a pilot on board, who knew all the coast and all the breakers, and had a clear eye, and a firm heart, and a practised hand, would you not let him have his own way? would you think of giving him your poor advice, or keep his hand from its work at the helm? You would not be such a fool, or so uncivil, or so mad. And yet many people do this very same sort of thing, just because they don't really trust their Doctor; and a doctor is a pilot for your bodies when they are in a storm and in distress. He takes the helm, and does his best to guide you through a fever; but he must have fair play; he must be trusted even in the dark. It is wonderful what cures the very sight of a doctor will work, if the patient believes in him; it is half the battle. His very face is as good as a medicine, and sometimes better,--and much pleasanter too.