Who said "Change is the only constant"?

This quote is attributed to Rubén Darío.

Change is the only constant - Rubén Darío

"Change is the only constant"

Rubén Darío Change

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"

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."