How much does one genuinely have concern for others, that's the question. It is the truest measure of character. It's a much truer measure of character than mere courage, tenacity or grit....though all those are very worthy qualities in their own right. But there are some very courageous and tough people in this world who really don't give a damn about anyone but themselves...and they aren't much use to the rest of the community, are they? (Babyface Nelson would be an interesting example of that. He had tons of physical courage, acquired in a very tough growing up experience, but he was a curse on his community, because he was simply out for himself. Another good example: Blackbeard the Pirate. No lack of courage and grit there, but he was a curse on the society of his time.)