The word 'happiness' would lose its meaning if it were not balanced and contrasted and compared to sadness. In comparing how an experience could have been worse we develop gratitude and happiness, while if we compare it how it could have been better we develop bitterness and sadness.
Carl JungEvery human being is inherently a unique and individual form of life. He or she is made like that. But there is something which a person can do over and above the given material of her nature, and that is she can become conscious of what makes her the person she is, and he can work consciously toward relating what is himself to the world around him.
Carl Jung