Harder is better.
I find myself at peace when I feel hardened. Being hard can both be a physical and mental concept to consider. I like to harden my body through weightlifting and cold showers.
Pain makes you harder.
Become hardened by life itself where there’s nothing external that can affect you and your emotions. Perhaps man was designed to be like a rock. While it’s nice to think and to be in a state of play, I feel the most power when I shut everything out and simply be.