Deliberate cold exposure improves mental performance (resilience, grittiness, the ability to move through challenges).

To me the cold is like God, you could say that. I think the cold as a noble force. It's just helping me, training me, it's bringing me back to my inner nature the way it is meant to be. And this way I do not only endure the cold, I LOVE THE COLD

Cold water exposure is the best return on investment for your health for all the health benefits you receive for dedicating such a small amount of time.