What Wondrous Love Is This has a beautiful melody that works well on the guitar. This is an old hymn that was first published back in 1811.
An interesting nugget about this piece is that it is in the Dorian mode. The dorian mode can be built by first writing out a natural minor scale (ex. A, B, C, D, E, F, G) and then raising the 6th note. So a dorian scale on A would go A, B, C, D, E, F-sharp, G, A. This particular melody is in D dorian so the scale goes: D, E, F, G, A, B, C, D.
I hope you enjoy this teaching video. You can see many more by visiting my guitar school found at my website.