This is a celebrated aria from Bach's cantata BWV 68, renowned for its jubilant and virtuosic depiction of God's love. The piece contrasts intense fugal sections with soaring melodic passages.
Demands exceptional finger dexterity, clarity in rapid passages, and controlled vocal-like phrasing.
Also hat Gott die Welt geliebt (BWV 68) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Also hat Gott die Welt geliebt (BWV 68) lasts about 7 minutes.
Also hat Gott die Welt geliebt (BWV 68) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.