There are certain yoga laws and principles that are, shall we say, less tangible than others. For example, the law of karma. Science has proven what goes up must come down, but that's about as far as it's gone. To believe that for every action, word, and thought, there is an equal consequence takes something more intuitive, more personal; it's more metaphysical.
In the Native American tradition. . . a man, if he's a mature adult, nurtures life. He does rituals that will help things grow, he helps raise the kids, and he protects the people. His entire life is toward balance and cooperativeness. The ideal of manhood is the same as the ideal of womanhood. You are autonomous, self-directing, and responsible for the spiritual, social and material life of all those with whom you live.