Cheerfulness removes the rust from the mind, lubricates our
inward machinery, and enables us to do our work with fewer
creaks and groans. If people were universally cheerful,
probably there wouldn't be half the quarreling or a tenth part
of the wickedness there is. Cheerfulness, too, promotes health
and immortality. Cheerful people live longest here on earth,
afterward in our hearts.

~Anonymous~