If you enjoy others' happiness, others will also enjoy their happiness; if you worry about others' worries, others will also worry about their worries. ——Bai Juyi

Happiness should be the companion of virtue. —— Valdes

You should not pursue all kinds of happiness, but only noble happiness. —— Democritus

True happiness is inner, it can only be found in the human soul. —— Bremer

The so-called inner happiness is the happiness that a person feels when he lives a healthy, normal and harmonious life. ——Romain Rolland

Optimism sees a hope in a disaster, and pessimism sees a disaster in a hope.

Happiness is not inherently bad, but some producers of happiness bring troubles many times greater than happiness. ——Epicurus

No happiness is without trouble. ——Fu Lai

People who have toothache think that there is one kind of person in the world who is the happiest, and that is a person who does not have toothache.

——Bernard Shaw

There is no cosmetic in the world that can make people more beautiful than happiness. ——Breton