The classic experiment on pain tolerance is to submerse your hand in freezing cold water and see how long you can take it. 

You can try to distract yourself by counting slowly or focussing on your breath, but no matter how high you count, or how deeply you breathe, that water is still undeniably cold. 

When you're in pain, you can grin and bear it all you want. You can try to pretend it's not there.

 But there's no glory in suffering. There's no reward. 

It doesn't make you wiser or stronger. It doesn't make you immune.

 Sometimes it makes the pain even worse.