missing out this necessary lightness of being

One morning when I was caught in a frenzy to get to work, I recalled what my father used to say long ago. That's when it occurred to me how important a bit of silliness occasionally is to the health of a family--and how much I in particular was missing out this necessary lightness of being.

Hi,
Does "lightness of being" in the above refer to "lightness of life?" Thanks.