In order therefore to be a faithful witness, it is first necessary that a man doth not undertake it from the least prospect of any private advantage to himself. The smallest mixture of that leaven will sour the whole lump. Interest will infallibly bias his judgment, although he be ever so firmly resolved to say nothing but truth. He cannot serve God and Mammon; but as interest is his chief end, he will use the most effectual means to advance it. He will aggravate circumstances to make his testimony valuable; he will be sorry if the person he accuseth should be able to clear himself; in short, he is labouring a point which he thinks necessary to his own good; and it would be a disappointment to him, that his neighbour should prove innocent.
5thly, Every good subject is obliged to bear witness against his neighbour, for any action or words, the telling of which would be of advantage to the public, and the concealment dangerous, or of ill example. Of this nature are all plots and conspiracies against the peace of a nation, all disgraceful words against a prince, such as clearly discover a disloyal and rebellious heart: But where our prince and country can possibly receive no damage or disgrace; where no scandal or ill example is given; and our neighbour, it may be, provoked by us, happeneth privately to drop a rash or indiscreet word, which in strictness of law might bring him under trouble, perhaps to his utter undoing; there we are obliged, we ought, to proceed no further than warning and reproof.
In describing to you the several kinds of false witnesses, I have made it less necessary to dwell much longer upon this head; because a faithful witness like everything else is known by his contrary: Therefore it would be only a repetition of what I have already said to tell you, that the strictest truth is required in a witness; that he should be wholly free from malice against the person he accuses; that he should not aggravate the smallest circumstance against the criminal, nor conceal the smallest in his favour; and to crown all, though I have hinted it before, that the only cause or motive of his undertaking an office, so subject to censure, and so difficult to perform, should be the safety and service of his prince and country.
Under these conditions and limitations (but not otherwise,) there is no manner of doubt but a good man may lawfully and justly become a witness in behalf of the public, and may perform that office (in its own nature not very desirable) with honour and integrity. For the command in the text is positive as well as negative; that is to say, as we are directed not to bear false witness against our neighbour, so we are to bear true. Next to the word of God, and the advice of teachers, every man's conscience, strictly examined, will be his best director in this weighty point; and to that I shall leave him.
It might perhaps be thought proper to have added something by way of advice to those who are unhappily engaged in this abominable trade and sin of bearing false witness; but I am far from believing or supposing any of that destructive tribe are now my hearers. I look upon them as a sort of people that seldom frequent these holy places, where they can hardly pick up any materials to serve their turn, unless they think it worth their while to misrepresent or pervert the words of the preacher: And whoever is that way disposed, I doubt, cannot be in a very good condition to edify and reform himself by what he heareth. God in his mercy preserve us from all the guilt of this grievous sin forbidden in my text, and from the snares of those who are guilty of it!
I shall conclude with one or two precepts given by Moses, from God, to the children of Israel, in the xxiiid of Exod. 1, 2.
"Thou shalt not raise a false report: Put not thine hand with the wicked, to be an unrighteous witness.
"Thou shalt not follow a multitude to do evil, neither shalt them speak in a cause to decline after many, to wrest judgment."
Now to God the Father, &c.