A classic Bach chorale harmonization, often studied for its masterful voice leading. It provides an excellent look at Bach's ability to create depth within a simple four-part structure.
Carefully manage the transitions between chords, keeping all four voices balanced.
Brich an o schones Morgenlicht is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Brich an o schones Morgenlicht lasts about 2 minutes.
Brich an o schones Morgenlicht is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.