When I first became a Christian about 8 years ago, I somehow got the idea that praise and worship music was the truly "spiritual music" - hymns were old-fashioned, and people who enjoyed them did so because they were hide-bound by tradition. If you're thinking this now, please listen to me.
A year or so ago I heard about well-known and respected Christians like John MacArthur and Joni Eareckson Tada talk about how the old hymns were so meaningful to them and really strengthened their faith. That got me thinking: so it's not just stodgy old 80-year olds who love those old hymns. Maybe there's something to them after all.
So I got this book. And I have been so blessed by it. God has shown me that true worship is so much more than just a feeling. He wants all parts of me - my body, my soul, and my spirit - to be involved in worship. So many in churches today are satisfied with getting only their spirits involved; some want their body involved too (lifting hands, etc.); but the truly mature (I am coming to believe) also get their souls (or minds) involved. Your mind doesn't get involved when you just repeat "Isn't He" fifty times; it does when you sing (and really think about) the wonderful words to songs like "O, the Deep, Deep Love of Jesus" or "Blessed Assurance."
Both these songs and many, many more are covered in this book. Get it, sing the songs, think about what Christ has done for you, think about the circumstances of their writing. And take your worship to another level.