Generally speaking, yang manifests the basic nature of fire - such as heat, motion, brightness, upward and outward, excitement and potency - while yin manifests the basic nature of water - such as coldness, stillness, dimness, downward and inward, inhibition and weakness.
总的来说，那些自然界属火的，像热、运动的、明亮的、方位的上和外、兴奋和力气都属于阳；而那些的自然界属水的，像冷、安静的、晦暗的、方位的下和里、弱的都于阴。