Who said "We grow through challenge, not through comfort."?

This quote is attributed to Oliver Tambo.

We grow through challenge, not through comfort. - Oliver Tambo

"We grow through challenge, not through comfort."

Oliver Tambo

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."