The most-likely author of Psalm 119:18 is King David, who is traditionally credited with writing many of the Psalms. King David is considered an important figure in the Old Testament and a key author of many of the Psalms, which are songs of praise, thanksgiving, and lamentation.

From an evangelical Christian perspective, King David is viewed as a man after God’s own heart, despite his flaws and shortcomings. He is remembered for his deep faith and trust in God, as well as his honesty and transparency in expressing his emotions and struggles in his writings.

In Psalm 119:18, King David expresses his desire for God to open his eyes, so that he may see the wonderful things in God’s law. This verse reflects David’s commitment to living according to God’s commandments and seeking greater understanding and insight into God’s word.

Evangelical Christians believe that the Bible is the inspired and authoritative word of God, and they strive to follow its teachings and principles. Therefore, Psalm 119:18 is often seen as a prayer for illumination and guidance in understanding and applying the truths found in Scripture. It reflects the believer’s reliance on God for spiritual insight and understanding.