The Unbearable Lightness of Being is an outstanding book and a horrific movie, unless you like depressing European movies with little dialogue that slowly plod along. (If so, make sure you also see 4 Months, 3 Weeks, and 2 Days).
But really, one of the challenges of life is to live lightly, but not too lightly. Montainge mentions that in his essays:
“The most manifest sign of wisdom is a continual cheerfulness; her state is like that in the regions above the moon, always clear and serene.”