Thy righteousness is an everlasting righteousness, and thy law is the truth.

Wesley's Notes

119:142 Everlasting - The same in all ages and places.

Jamieson-Fausset-Brown Bible Commentary

142-144. The principles of God's government are permanent and reliable, and in the deepest distress His people find them a theme of delightful meditation and a source of reviving power (Ps 119:17, 116).

law is the truth-It therefore cannot deceive as to its promises.

everlasting-(Ps 111:3), though to outward appearance seeming dead.

Matthew Henry's Concise Commentary

119:137-144 God never did, and never can do wrong to any. The promises are faithfully performed by Him that made them. Zeal against sin should constrain us to do what we can against it, at least to do more in religion ourselves. Our love to the word of God is evidence of our love to God, because it is designed to make us partake his holiness. Men's real excellency always makes them low in their own eyes. When we are small and despised, we have the more need to remember God's precepts, that we may have them to support us. The law of God is the truth, the standard of holiness, the rule of happiness; but the obedience of Christ alone justifies the believer. Sorrows are often the lot of saints in this vale of tears; they are in heaviness through manifold temptations. There are delights in the word of God, which the saints often most sweetly enjoy when in trouble and anguish. This is life eternal, to know God and Jesus Christ whom he has sent, Joh 17:3. May we live the life of faith and grace here, and be removed to the life of glory hereafter.