Laughter is a bodily exercise, precious to Health
Happiness is something final and complete in itself, as being the aim and end of all practical activities whatever .... Happiness then we define as the active exercise of the mind in conformity with perfect goodness or virtue.
Happiness is activity.
If happiness is activity in accordance with excellence, it is reasonable that it should be in accordance with the highest excellence.
The ridiculous is produced by any defect that is unattended by pain, or fatal consequences; thus, an ugly and deformed countenance does not fail to cause laughter, if it is not occasioned by pain.