I'm persistant.
If I have an idea or goal that matters, I'll persist.
Yet, when do you stop knocking on a closed door?
There are a few doors I've been knocking on that don't budge. It's time to let those doors be and move to doors that more readily invite conversation, new ideas, and learning.
How long do you knock on a closed door? That's a good question to be cognizant of particularly since knocking on a closed door is energy and time lost for opportunities and promise that await.