Stubborn as a mule means refusing to change your mind or behavior even when there are good reasons to do so.
The phrase comes from the reputation of mules. They are known for not following commands when they decide they don't want to.
The phrase comes from the reputation of mules. They are known for not following commands when they decide they don't want to.
He was as stubborn as a mule when it came to fixing the old car his way.