"The general rule is, that Truth should never be violated, because it is of the utmost importance to the comfort of life, that we should have a full security by mutual faith; and occasional inconveniences should be willingly suffered that we may preserve it. There must, however, be some exceptions. If, for instance, a murderer should ask you which way a man is gone, you may tell him what is not true, because you are under a previous obligation not to betray a man to a murderer."