A faithful witness will not lie: but {e} a false witness will utter lies.

(e) For the maintenance of his own ambition, and not for God's glory, as Simon Magus.

Jamieson-Fausset-Brown Bible Commentary

5. A faithful witness, &c.-one tested to be such.

utter lies-or, "breathe out lies"-that is, habitually lies (Pr 6:19; compare Ac 9:1). Or the sense is, that habitual truthfulness, or lying, will be evinced in witness-bearing.

Matthew Henry's Concise Commentary

14:1 A woman who has no fear of God, who is wilful and wasteful, and indulges her ease, will as certainly ruin her family, as if she plucked her house down. 2. Here are grace and sin in their true colours. Those that despise God's precepts and promises, despise God and all his power and mercy. 3. Pride grows from that root of bitterness which is in the heart. The root must be plucked up, or we cannot conquer this branch. The prudent words of wise men get them out of difficulties. 4. There can be no advantage without something which, though of little moment, will affright the indolent. 5. A conscientious witness will not dare to represent anything otherwise than according to his knowledge. 6. A scorner treats Divine things with contempt. He that feels his ignorance and unworthiness will search the Scriptures in a humble spirit. 7. We discover a wicked man if there is no savour of piety in his discourse. 8. We are travellers, whose concern is, not to spy out wonders, but to get to their journey's end; to understand the rules we are to walk by, also the ends we are to walk toward. The bad man cheats himself, and goes on in his mistake. 9. Foolish and profane men consider sin a mere trifle, to be made light of rather than mourned over. Fools mock at the sin-offering; but those that make light of sin, make light of Christ. 10. We do not know what stings of conscience, or consuming passions, torment the prosperous sinner. Nor does the world know the peace of mind a serious Christian enjoys, even in poverty and sickness. 11. Sin ruins many great families; whilst righteousness often raises and strengthens even mean families. 12. The ways of carelessness, of worldliness, and of sensuality, seem right to those that walk in them; but self-deceivers prove self-destroyers. See the vanity of carnal mirth. 14. Of all sinners backsliders will have the most terror when they reflect on their own ways. 15. Eager readiness to believe what others say, has ever proved mischievous. The whole world was thus ruined at first. The man who is spiritually wise, depends on the Saviour alone for acceptance. He is watchful against the enemies of his salvation, by taking heed to God's word. 16. Holy fear guards against every thing unholy. 17. An angry man is to be pitied as well as blamed; but the revengeful is more hateful.

Matthew Henry's Whole Bible Commentary

Verse 5

In the administration of justice much depends upon the witnesses, and therefore it is necessary to the common good that witnesses be principled as they ought to be; for, 1. A witness that is conscientious will not dare to give in a testimony that is in the least untrue, nor, for good-will or ill-will, represent a thing otherwise than according to the best of his knowledge, whoever is pleased or displeased, and then judgment runs down like a river. 2. But a witness that will be bribed, and biassed, and browbeaten, will utter lies (and not stick nor startle at it), with as much readiness and assurance as if what he said were all true.