Psalms 15:3

He that backbiteth not with his tongue,....

By the assurance given in the close of the psalm of the safety and happiness of those who answer these characters we are encouraged to walk in that way,

After the positive comes the negative. "He that backbiteth not with his tongue." There is a sinful way of backbiting with the heart when we think too hardly of a neighbour, but it is the tongue which does the mischief. Some men's tongues bite more than their teeth. The tongue is not steel, but it cuts, and it's wounds are very hard to heal; its worst wounds are not with its edge to our face, but with its back when our head is turned.

After the positive comes the negative. "He that backbiteth not with his tongue." There is a sinful way of backbiting with the heart when we think too hardly of a neighbour, but it is the tongue which does the mischief. Some men's tongues bite more than their teeth. The tongue is not steel, but it cuts, and it's wounds are very hard to heal; its worst wounds are not with its edge to our face, but with its back when our head is turned. Under the law, a night hawk was an unclean bird, and its human image is abominable everywhere. All slanderers are the devil's bellows to blow up contention, but those are the worst which blow at the back of the fire. "Nor doeth evil to his neighbour." He who bridles his tongue will not give a licence to his hand. Loving our neighbour as ourselves will make us jealous of his good name, careful not to injure his estate, or by ill example to corrupt his character. "Nor taketh up a reproach against his neighbour." He is a fool if not a knave who picks up stolen goods and harbours them; in slander as well as robbery, the receiver is as bad as the thief. If there were not gratified hearers of ill reports, there would be an end of the trade of spreading them. Trapp says, that "the tale-bearer carrieth the devil in his tongue, and the tale-hearer carries the devil in his ear." The original may be translated, "endureth;" implying that it is a sin to endure or tolerate tale-bearers. "Show that man out!" we should say of a drunkard, yet it is very questionable if his unmanly behaviour will do us so much mischief as the tale-bearers insinuating story. "Call for a policeman!" we say if we see a thief at his business; ought we to feel no indignation when we hear a gossip at her work? Mad dog! Mad dog!! is a terrible hue and cry, but there are few curs whose bite is so dangerous as a busybody's tongue. Fire! fire!!

He that backbiteth not with his tongue - לא רגל על לשנו lo ragal al leshono, “he foots not upon his tongue.” 4. He is one who treats his neighbor with respect. He says nothing that might injure him in his character, person, or property; he forgets no calumny, he is author of no slander, he insinuates nothing by which his neighbor may be injured. The tongue, because of its slanderous conversation, is represented in the nervous original as kicking about the character of an absent person; a very common vice, and as destructive as it is common: but the man who expects to see God abhors it, and backbites not with his tongue. The words backbite and backbiter come from the Anglo-Saxon bac, the back, and to bite. How it came to be used in the sense it has in our language, seems at first view unaccountable; but it was intended to convey the treble sense of knavishness, cowardice, and brutality. He is a knave, who would rob you of your good name; he is a coward, that would speak of you in your absence what he dared not to do in your presence; and only an ill-conditioned dog would fly at and bite your back when your face was turned. All these three ideas are included in the term; and they all meet in the detractor and calumniator. His tongue is the tongue of a knave, a coward, and a dog. Such a person, of course, has no right to the privileges of the Church militant, and none of his disposition can ever see God. Nor doeth evil to his neighbor - 5. He not only avoids evil speaking, but he avoids also evil acting towards his neighbor. He speaks no evil of him; he does no evil to him; he does him no harm; he occasions him no wrong. On the contrary, he gives him his due. See under the second particular. Nor taketh up a reproach against his neighbour - 6. […]

He that backbiteth not with his tongue - The word “backbite” means to censure; slander; reproach; speak evil of. The Hebrew word - רגל râgal - a verb formed from the word foot, means properly “to foot it,” and then “to go about.” Then it means to go about as a tale-bearer or slanderer; to circulate reports unfavorable to others. It is not improperly rendered here “backbite;” and the idea is, that it is essential to true piety that one should “not” be a slanderer, or should “not” circulate evil reports in regard to others. On the use of the “tongue,” see the note at Jas 3:2-11. Nor doeth evil to his neighbor - That does his neighbor no harm. This refers to injury in any way, whether by word or deed. The idea is, that the man who will be admitted to dwell on the holy hill of Zion, the man who is truly religious, is one who does no injury to anyone; who always does that which is right to others. The word “neighbor” usually refers to one who resides near us; and their it denotes all persons who are near to us in the sense that we have business relations with them; all persons with whom we have anything to do. It is used in this sense here as referring to our dealings with other persons. Nor taketh up a reproach - Margin, “or receiveth,” or, “endureth.” The idea is that of “taking up,” or receiving as true, or readily giving credit to it. He is slow to believe evil of another. He does not grasp at it greedily as if he had pleasure in it. He does not himself originate such a reproach, nor does he readily and cheerfully credit it when it is stated by others. If he is constrained to believe it, it is only because the evidence becomes so strong that he cannot resist it, and his believing it is contrary to all the desires of is heart. This is true religion every where; but this is contrary to the conduct of no small part of the world. […]