I've been in the army. I've taken cold showers every day. Our commanders woke us up in 2am for a long run while carrying a rubber boat filled with water to the beach almost every day. When we finally got to the beach, we had to do push ups with our head inside the freezing water. I ran 20km carrying a fat man on a stretcher, cursing him under what remained of my breath.

Guess what? I still read HN instead of getting shit done.

Tolerance is only built on the same vector.