It needs wisdom to comprehend others; it requires wisdom and sense to know oneself.
It needs power to conquer others; it needs inner strength and self-control to conquer oneself.
Contentment can give you feeling of riches; Greed is the most serious poverty.
Those who firmly persevere on their target have strong willpower.
You can go far and have a long duration if you never lose your goal and stance.
If your spirit and career can pass on generation by generation, you have an eternal life.
Laozi: a philosopher of ancient China and an important figure of Taoism.