"I had a rough childhood coming up, and I just took all that negative energy and made it very positiv..." — David Goggins

A warrior is not a person that carries a gun. The biggest war you ever go through is right between your own ears. It's in your mind. We're all going through a war in our mind, and we have to callus our mind to fight that war and to win that war.

You have to be willing to go to war with yourself and create a whole new identity.

Our whole life is set up in the path of least resistance. We don't want to suffer. We don't want to feel discomfort. So the whole time, we're living our lives in a very comfortable area. There's no growth in that.

It's like a muscle - if you stop going to the gym or stop running, you get weak. The military teaches you these great values, but we don't keep up the discipline on our own, and we lose it. So wherever you go, keep that discipline up.