Who said "Perseverance is the mark of a true revolutionary."?

This quote is attributed to Fidel Castro.

Perseverance is the mark of a true revolutionary. - Fidel Castro

"Perseverance is the mark of a true revolutionary."

Fidel Castro Perseverance

President, Revolutionary Leader Cuban 1926–2016

"A revolution is not a bed of roses."

"Condemn me, it does not matter. History will absolve me."

"The revolution is not an apple that falls when it is ripe. You have to make it fall."

"I am a Marxist-Leninist and will be one until the day I die."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."