In Chinese cosmology, everything in the universe is seen as having masculine and feminine aspects or qualities which arise out of the "emptiness" which they call the the Tao. "Yin yang are complementary opposites that interact within a greater whole, as part of a dynamic system. Everything has both yin and yang aspects, but either of these aspects may manifest more strongly in particular objects, and may ebb or flow over time. The concept of yin and yang is often symbolized by various forms of the Taijitu symbol, for which it is probably best known in western cultures." (Wikipedia: Yin and yang) We can illustrate this by dropping a stone in a pond of water. The waves it generates consist of hills and valleys which in time dissipate, the pond is calm once more.
So, we see in the atom itself neutrons (+) and electrons (-) interacting. The sun with its penetrating rays is masculine while the earth which receives them is feminine. A word is masculine while the ear which receives it is feminine. A rock is masculine while water which yields to it is feminine. Wind is masculine while clouds driven by it are feminine, and so on.
Ingrained in cosmic duality is the reality of love. Love is the tendency in every creature toward union with the good, other creatures toward which it has an affinity. So, every being, as a unity, is a work of love. So oxygen unites with hydrogen to form water. A flower loves the warmth of the sun which it receives. The bee loves the flower for it sugar and pollen while the flower attracts the bee so as to reproduce. The plant loves the water which it takes into itself. The peacocks spread its beautiful feathers so as to attract a mate. The dragonfly loves the grass upon which it rests. The geese instinctively love their young and care for them. The cat loves to eat the mouse. The woman and child love the beauty of flowers. Beauty is present in all creatures and point to a beauty beyond the visible world. Ultimately man and woman tend to love God who is all good and beautiful. Every creatures loves itself and others because it is limited and must love in some way to reach its perfection.