1. He's content with his life.2. He's happy with his life.3. The billionaire lives a simple life. He rides a bicycle to work every day.4. Happiness is not having what you want, it's wanting what you have.5. Be grateful for what you have.
 content; happy thankful; grateful Happiness is not having what you want, it's wanting what you have.thankful 跟 grateful 指心存感謝的人, 通常知足的人也是心存感謝，而 Happiness is not having what you want, it's wanting what you have. 則是一個有趣的名言，就是知足常樂的意思。
She is shy, but when there is a guest at home, she becomes excied and hyperactive and out of control.