Tao Te Ching
Dé/Te 德 means "virtue" as in "personal character" or "inner strength". People who followed the teachings of Confucius used it to mean "morality". A long time ago in English, "virtue" could mean "power" (as in the phrase "healing virtue of a drug"). The same thing was true in Chinese: the word meant "power" a long time ago but now means "virtue".