Pain good or bad?

Is pain a good thin or bad? Some people say, "This is a stupid question! Of course its bad". Pain in my definition is not just physical pain but also the one you fell in your heart, the feeling of uneasiness and suffering that cannot be cured by science or medicine.

You seem if we humans feel no physical pain, we wont take care of our body well. Let's say for instance, you purposely run at top speed and bang head-on against the wall and you dont die, would you be afraid to try it another time since it didnt hurt? Answer is nope you wont be afraid to do it again. You feel no pain, that  why its not stopping you to make such a dumb move to hurt yourself . So you see, physical pain stops us from hurting ourselves and teaches us a lesson to not commit dumb acts that can hurt us.

Whereas for mental pain, let's just say we cannot fell the pain on the inside. We would commit acts tat we loose out such as tricked of all money again and again, loosing loved ones wouldnt matter at all and so on. With the feeling gone, we dont feel guilt, we don't feel love, and we do not cherish anything that is important to us, With the feeling on the other hand, we learn to feel pain and to be stronger too. Not to forget that we would try even harder to achieve something we fail in the past.

Lesson here is that every time we feel pain, we learn! Learn to be stronger, learn to overcome our problems when times are hard, learn not to hurt ourselves and others and last of all learn from our mistakes and remember never to repeat them again. So is pain good or bad? You tell me.