During piano lessons 1 1/2 years ago, while working on the hymn "LIKE A RIVER GLORIOUS", our teacher introduced the book LIFE CHORDS by Frances Ridley Havergal. I do not think that it is in print anymore. We bought ours used over the internet. This verse is part 1 of "Precious Things". I will share the rest of the verses periodically.
"O WHAT shining revelation of His treasures God hath given!Precious things of grace and glory, precious things of earth and heaven.
Holy Spirit, now unlock them with Thy might golden key,
Royal jewels of the kingdom let us now adoring see!"