Hey, you know how the saying goes:
If at first you don't succeed, try, try again. Right?
So really, when this determined dog keeps on trying to get that broom through the doorway, he's only doing what society tells us all to do.
Because, forgive me if I'm wrong, but I'm pretty sure there's nothing in that little try, try again verse about until it becomes apparent that your course of action is doomed to fail.
Also worth considering, of course, are what sort of plans this dog has for his prized possession. Perhaps he knocked over a jar of flour and wants to sweep up the evidence before anyone notices. Perhaps he thinks his owner is a less-than-stellar housekeeper.
Sadly, I'm not a dog-mind reader, so I don't know. But watch:
See? The broom is very important to him, clearly.
What do you think this dog wants to do with his broom?
Image via MartinMoselyVisions/YouTube