Who said "A woman's duty is to make the world a better place."?

This quote is attributed to Florence Nightingale.

A woman's duty is to make the world a better place. - Florence Nightingale

"A woman's duty is to make the world a better place."

Florence Nightingale

Nurse and Statistician English 1820–1910

"I attribute my success to this: I never gave or took any excuse."

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

"To understand God's thoughts, we must study statistics, for these are the measure of His purpose."

"Were there none who were discontented with what they have, the world would never reach anything better."