It's not a question of happiness, it's a requirement. Consider the alternative.
— Doug Horton

The first requirement of a statesman is that he be dull. This is not always easy to achieve.
Dean Acheson requirements quote

Variability is one of the virtues of a woman. It avoids the crude requirement of polygamy. So long as you have one good wife you are sure to have a spiritual harem.
— G. K. Chesterton

The very first requirement in a hospital is that it should do the sick no harm.
— Florence Nightingale

The recommended daily requirement for hugs is: four per day for survival, eight per day for maintenance, and twelve per day for growth.
— requirements quotation by Virginia Satir