I found this quotation by Alan Jacobs (with an assist by the best passer in the game, Austin Kleon):

Remember Pascal’s warning against the error of Stoicism, which is to believe that you can do always what you can really only do sometimes.

It’s important because it’s of the “work-hard-but-forgive-yourself-when-things-don’t-go-as planned-because-after all-you’re-only-human” variety.  Source is Snakes and Ladders, where Alan Jacobs records “stray random thoughts.”