It's getting up and going out even though it's raining, or cold, or hotter than hell. It's knowing what you want, and wanting to get there, and staying on the path even though it would be easier to just turn around and go home. It's knowing that no matter what your goal is, it's gonna take a while to get there.
Perseverance is doing it even though you are scared.
Perseverance is knowing that a break in the action will mean it's harder to get going again, but going and doing it anyway.
I've been sick, and I've been busy, and I've been inconsistent in my riding for a few months. This afternoon, oh, it showed, but oh, it was so nice to be back in the saddle again.