How do we know understanding the law through Christ is true?

The psalmist states in Psalm 119:34, 'Give me understanding, and I shall keep thy law; yea, I shall observe it with my whole heart.' This understanding is key to grasping that Christ not only fulfills the law but also grants believers the status of having kept it through their union with Him. In Scripture, this understanding is a gift from God, allowing the believer to see that they are accepted in Christ's righteousness, thus freeing them from the condemnation of the law. It reflects the core of the Gospel—Christ’s completed work provides the basis for our standing before God and our fulfillment of His law.