Laughter brightens the eye, increases the perspiration, expands the chest, forces the poisoned air from the least-used cells, and tends to restore that exquisite poise or balance which we call health.
Orison Swett Marden (2015). “Cheerfulness As A Life Power (Unabridged): How to Avoid the Soul-Consuming and Friction-Wearing Tendencies of Everyday Life”, p.5, e-artnow