“The foremost reason that happiness is so hard to achieve is that the universe was not designed with the comfort of human beings in mind. It is almost immeasurably huge, and most of it is hostilely empty and cold. It is the setting for great violence, as when occasionally a star explodes, turning to ashes everything within billions of miles. The rare planet whose gravity field would not crush our bones is probably swimming in lethal gases. Even planet Earth, which can be so idyllic and picturesque, is not to be taken for granted. To survive on it men and women have had to struggle for millions of years against ice, fire, floods, wild animals, and invisible microorganisms that appear out of nowhere to snuff us out.”

− Mihaly Csikszentmihalyi −