This principle is simply the law of polarity put in action. Masculine and feminine principles are always at work in the world, whether we recognize them or not. We are all a blending of both masculine and feminine energies.
Classically, feminine energy is considered to be magnetic, as feminine energy draws in and is nurturing and yielding, while masculine energy projects out and is strong and assertive. Imagine how the ideas of magnetic energy and assertive
energy can be applied. The possibilities are endless.