Psalms 119:142 from the King James Version (KJV) of the Bible reads: "Thy righteousness is an everlasting righteousness, and thy law is the truth."

This verse is a powerful declaration of the eternal nature of God's righteousness and the infallibility of His law. It is a statement of absolute confidence and trust in the righteousness of God, which is unchanging and everlasting. At the same time, it affirms the absolute truth of God's law, which is the foundation of all moral and ethical principles.

The theme of righteousness is a central focus in the Psalms, as it is throughout the Bible. Righteousness is an attribute of God that reflects His perfect moral character and His adherence to justice and truth. In this verse, the psalmist is acknowledging and exalting the eternal nature of God's righteousness, emphasizing that it is not subject to change or decay. This serves as a source of comfort and reassurance for believers, knowing that they can rely on the unchanging righteousness of God in all circumstances.

The concept of righteousness is closely linked to the idea of God's law, which is described as the truth in this verse. Throughout the Bible, God's law is often equated with His perfect moral standards and is seen as the ultimate source of truth and guidance for human conduct. The psalmist's declaration that God's law is the truth reinforces the idea that it is a reliable and unerring guide for living a life that is pleasing to God.

The context of this verse is within Psalm 119, the longest chapter in the Book of Psalms, which is entirely devoted to a celebration of God's law. The psalmist expresses his love for and devotion to God's commandments, testimonies, precepts, and statutes throughout the passage. Each verse emphasizes the immeasurable value of God's law and its importance in shaping the righteous life of the believer. In this particular verse, the psalmist is affirming the enduring nature of God's righteousness and the unassailable truth of His law as the ultimate standard for living.

The symbolism in this verse lies in the contrast between the eternal nature of God's righteousness and the transient nature of human understanding and morality. It serves to highlight the immense gap between the perfection of God's character and the flawed nature of humanity. By acknowledging the unchanging righteousness of God and the truth of His law, the psalmist underscores the need for reliance on and submission to God's perfect standards rather than relying on our own flawed understanding.

From a broader theological perspective, this verse also points to the redemptive work of Jesus Christ as the ultimate expression of God's righteousness and truth. In the New Testament, Jesus is referred to as the fulfillment of the Law and the embodiment of God's righteousness. Through His atoning sacrifice, Jesus provided a way for humanity to be reconciled with God and to partake in His righteousness. Therefore, this verse also serves as a precursor to the coming of Christ and the establishment of a new covenant based on the righteousness and truth of God.

In conclusion, Psalms 119:142 exalts the everlasting righteousness of God and the unassailable truth of His law. It emphasizes the unchanging nature of God's character and the reliability of His moral standards as the ultimate guide for righteous living. This verse serves as a source of comfort and assurance for believers and underscores the need for reliance on God's righteousness and truth in all aspects of life. It also points to the redemptive work of Jesus Christ as the ultimate expression of God's righteousness and truth.