I agree that life is serious and everything that one does has implications.
But I refuse to _take_ it seriously. As skitten said, "what is the point of living if there is no joy, no fun, if one is frowned upon for enjoying it?" For me, to _take_ life seriously, one must approach it and deal with it in a somber mood. There are already too many grayfaces in the world. I'm not going to contribute to that.