All work and no play makes Jack a dull boy

"All work and no play makes Jack a dull boy" is a proverb. It means that if a person does not take time off from work, they will become both bored and boring.
The saying in its current form first appeared in James Howell's "Proverbs in English, Italian, French and Spanish" (1659). Some writers have added a second part to the saying, such as Maria Edgeworth in her book "Harry and Lucy Concluded" (1825):