During a Pub quiz early this week, a Shakespeare quote emerged in German translation, and I am keen to know the original wording and the work it stems from, or if it is possibly part of his notes.
This is my English translation of the line I heard in German:
Do not bemoan what cannot be altered but alter what is deplorable.
Beklage nicht, was nicht zu ändern ist,
aber ändere, was zu beklagen ist.
However, I can't find an equivalent line anywhere. Is there one? (I searched fruitlessly on several sites, e.g., https://myshakespeare.me/shakespeares-works/search-filter/)
[Note that this was cross-posted on EL&U as well]