Who said "Strength is not measured in power, but in perseverance."?

This quote is attributed to Rubén Darío.

Strength is not measured in power, but in perseverance. - Rubén Darío

"Strength is not measured in power, but in perseverance."

Rubén Darío Strength

Poet Nicaraguan 1867–1916

"I am my own road"

"I seek the divine in all things"

"The poet is a light and a flame"

"To be a poet is to possess wings"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."