Who said "A revolutionary must have a clear mind and a strong will."?

This quote is attributed to Che Guevara.

A revolutionary must have a clear mind and a strong will. - Che Guevara

"A revolutionary must have a clear mind and a strong will."

Che Guevara Leadership

Revolutionary, Guerrilla Leader Argentine-Cuban 1928–1967

"The true revolutionary is guided by a great feeling of love. It is impossible to think of a genuine revolutionary lacking this quality."

"At the risk of seeming ridiculous, let me say that the true revolutionary is guided by a great feeling of love."

"Hasta la victoria siempre (Until victory always)."

"One person with a gun can control 100 without one."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"