How do you know if you are good at martial arts?

How do you know if you are good at martial arts?
You have to take a couple classes and you might even want to try different forms it all depends if you have a passion for the art.

*I take kung fu and am currently a purple belt which is a more than half way to black (3 colors left, red, brown, and black). I don't think I am good. It all depends on your view. I look at the black belt who are so much better and that's how I judge my skills. If you look at any one who can kick high as good than that is your point of view. You have to answer that question for yourself. I would highly suggest you give martial arts a try if you have not already. Its really fun and great exercise.