Laughter is wine for the soul -- laugh soft, or loud and deep, tinged through with seriousness. Comedy and tragedy step through life together, arm in arm... Once we can laugh, we can live.
Source: Saturday Night in Green Crows, Grosset & Dunlap 56
-- Sean O'Casey, (Mar 30 1880-1964), Irish playwright; He was renowned for realistic dramas of the Dublin slums in war and revolution, in which tragedy and comedy are juxtaposed in a new way.