Who said "To lead is to serve; to serve is to lead"?

This quote is attributed to Oliver Tambo.

To lead is to serve; to serve is to lead - Oliver Tambo

"To lead is to serve; to serve is to lead"

Oliver Tambo Leadership

Anti-apartheid Leader, Politician South African 1917–1993

"The struggle is my life. I will continue fighting for freedom until it is won."

"Unity is strength. Division is weakness."

"An ideal is not as ideal unless it is universal."

"We must never give up the fight for justice, no matter how long it takes."

"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"