Many researchers point out that human beings are a spectacularly cooperative species, far surpassing other animals in the willingness to work closely and amicably with non-kin. Our altruistic impulse, they say, is no mere crown jewel of humanity; it is the bedrock on which we stand.
Some men who seemed impossibly weak at the beginning of SEAL training—men who puked on runs and had trouble with pull-ups—made it. Some men who were skinny and short and whose teeth chattered just looking at the ocean also made it. Some men who were visibly afraid, sometimes to the point of shaking, made it too.
Almost all the men who survived possessed one common quality. Even in great pain, faced with the test of their lives, they had the ability to step outside of their own pain, put aside their own fear and ask: How can I help the guy next to me? They had more than the “fist” of courage and physical strength. They also had a heart large enough to think about others, to dedicate themselves to a higher purpose.