Life is a continual dance of polarity. The ancient tantrics knew it. And anyone who regularly enjoys mind-blowing sex and happy relationships knows it.
Practically, when I rediscovered my yin energy, my life shifted. Actions became more spontaneous. Rather than planning ahead, I became much more present.
In finding balance, whether in a person or in a society, it is important that we strike a balance -- between yin and yang, feminine and masculine, receptivity and activity -- regardless of which gender we conform to (or not). It is in this balance that we become whole human beings.