This country was founded upon the principle that we are all endowed with certain inalienable rights to Life, Liberty, and the Pursuit of Happiness - those rights are what make America great, and they belong to each and every one of us.
What makes us exceptional - what makes us American - is our allegiance to an idea articulated in a declaration made more than two centuries ago: “We hold these truths to be self-evident, that all men are created equal; that they are endowed by their Creator with certain unalienable rights; that among these are life, liberty, and the pursuit of happiness.”
They had rejected the soul-body dichotomy, with its two corollaries: the impotence of man's mind and the damnation of this earth; they had rejected the doctrine of suffering as man's metaphysical fate, they proclaimed man's right to the pursuit of happiness and were determined to establish on earth the conditions required for man's proper existence, by the "unaided" power of their intellect.
We worry so much in this culture about being happy. The pursuit of happiness is even written in our Constitution. It's an erroneous concept because we are emotional, thinking beings that are constantly affected by a hundred things around us and inside us.