1. The question

I have two riddles. The first riddle's answer is a question and a hymn.

Find an LDS hymn whose title is a turning question.

What is the question of the riddle? To confirm your answer, sing the second riddle's words to the tune of the LDS hymn.

2. The answer

The second riddle's answer is a scripture verse that answers that question. Having answered the first riddle, you may sing the second.

I know a monolithic verse of scripture!
The ref-er-ence makes it a monolith too!
Its book's name is a match to solid matter;
Its math metes Space Odyssey's ra-ti-o.

What is the answer? Puzzle now upon the poetic melodic madness. If you find the answer, keep it, and consider how best to share.