Who said "Courage grows stronger the more we exercise it."?

This quote is attributed to Rubén Darío.

Courage grows stronger the more we exercise it. - Rubén Darío

"Courage grows stronger the more we exercise it."

Rubén Darío Courage

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"

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."