Who said "Solitude is the soil from which wisdom grows."?

This quote is attributed to Graça Machel.

Solitude is the soil from which wisdom grows. - Graça Machel

"Solitude is the soil from which wisdom grows."

Graça Machel Solitude

Humanitarian, Women's Rights Activist Mozambican-South African Born 1945 (age 81)

"Education is the most powerful weapon which you can use to change the world."

"We must believe that we are gifted for something, and that this thing, at whatever cost, must be attained."

"The future will be shaped by those who believe in the beauty of their dreams."

"Courage is not the absence of fear, but rather the assessment that something else is more important than fear."

"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."