The secret of happiness is hidden under the cover of spiritual knowledge.
The soul in Sanskrit, in the terms of the Vedanta, is called Atman which means happiness or bliss itself. It is not that happiness belongs to the soul; it is that the soul itself is happiness. Today we often confuse happiness with pleasure; but pleasure is only an illusion, a shadow of happiness; and in this delusion man may pass his whole life, seeking after pleasure and never finding satisfaction. ... Do you think that if these people gained their desires they would be happy? If they possessed all, would that suffice? No, they would still find some excuse for unhappiness; all these excuses are only like covers over a man's eyes, for deep within is the yearning for the true happiness which none of these things can give. He who is really happy is happy everywhere, in a palace or in a cottage, in riches or in poverty, for he has discovered the fountain of happiness which is situated in his own heart. As long as a person has not found that fountain, nothing will give him real happiness.