George Haydock's Catholic Commentary
Psalms 118:130
Declaration. By God's ministers renders them intelligible, though so wonderful in themselves. Hebrew styles this "the door of opening." (Berthier) --- The Scriptures are full of difficulties, and Daniel (ix. 2.) made them his study. Since the coming of Christ, the mysteries and prophecies have been more developed. But those who refuse to acknowledge him, grope at mid-day, Matthew xi. 25., and xviii. 5., and 1 Corinthians xiv. 20. (Calmet) --- The first entrance into the knowledge of holy Scripture illuminates the understanding of the humble, whence they proceed to know more. (Worthington)