Biography of the composer here:https://en.wikipedia.org/wiki/Josef_Rheinberger
This piece was in a book for Grade 5 organ. When I was younger this was about the limit of what I could play, and for a great many years I never got much beyond it. However, one day it all clicked and I moved on to greater things, though I am by no means a virtuoso or can play very complex pieces!
However, beautiful music exists that is relatively simple, and here is one such piece. Played with right hand on the Great with Harmonic Flute and the Choir's Concert Flute. The left hand plays the Swell soft 8s and 4s.