The moment you were were born, a subtle indicator is placed within you. It is part of life that you can always know what is happening, you can always feel whether you are happy or unhappy. Nobody asks how to know whether he is happy or unhappy. Nobody has ever asked. When you are unhappy, you know; when you are happy, you know. Then it is an intrinsic value. You know it, you are born knowing it, so let that intrinsic indication be used and it will never falsify your life.