Who said "The path of a revolutionary is often solitary."?

This quote is attributed to Fidel Castro.

The path of a revolutionary is often solitary. - Fidel Castro

"The path of a revolutionary is often solitary."

Fidel Castro Solitude

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."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."