《汉书·传·外戚传下》
太阳是天地间阳气的根源，是天上之光中最可宝贵者，有王者的气象，就是君主的尊位。
夫日者众阳之宗，天光之贵，王者之象，人君之位也。
The sun is the source of yang qi between heaven and earth, and it is the most precious light in the heavens, bearing the signs of the sovereign, which is the sovereign's position of honor.