In the Daodejing, the character 德 (dé) literally means virtue, though it can also be translated as moral power, power, or excellence. Here is a collection of quotations on the subject of virtue from the text.
生之蓄之,生而不有,為而不恃,長而不宰,是謂玄德。
Bearing and nurturing;
Bearing without possessing;
Acting without taking credit;
Leading without dominating.
This is called mysterious virtue.
Daodejing
Chapter 10