The great difficulty rests in the choice of him; that is to say, in the first place, let him be virtuous, for vice is contagious, and there is no trusting the sound and the sick together; and he ought to be a wise man too, if a body knew where to find him; but in this case, he that is least ill is best, and the highest degree of human prudence is only the most venial folly. That friendship where men’s affections are cemented by an equal and by a common love of goodness, it is not either hope or fear, or any private interest, that can ever dissolve it: but we carry it with us to our graves, and lay down our lives for it with satisfaction. Paulina’s good and mine (says our author) were so wrapped up together, that in consulting her comfort I provided for my own; and when I could not prevail upon her to take less care for me, she prevailed upon me to take more care for myself.