I'm Not an Elementalist

What are elements? Is it metal, wood, water, fire, and earth? Are they Yin and Yang twins? Is it the blue sky, the underworld, or the human world? Is it life, all things, the origin? The elements can take on various forms, causing them to arise in an instant. The elements rise and fall in half a lifetime, creating eternal existence. The elements are unable to show their sorrow, singing the song of destiny.