One that comes to mind for me: “Whatever doesn’t kill you makes you stronger” is not always true. Maybe even only half the time! Are there any phrases you tend to hear and shake your head at?
I prefer the version. “If you smell shit, check the floor. If you constantly smell shit, check your shoes.”
It’s a reminder that a 1 off problem is likely external to you. If the problem seems to follow you around, it’s likely attached to you.
It doesn’t deny that the problem could still be external, but not to externalise things unless you are sure you’re not causing it.