“Formal education will make you a living. Self-education will make you a fortune.”
“How dare you depend only on formal education when you can quadruple your results through constant self-education?”
Related quotes

Listen, Little Man! (1948)
Context: Every physician, shoemaker, mechanic or educator must know his shortcomings if he is to do his work and make his living. For some decades, you have begun to play a governing role on this earth. It is on your thinking and your actions that the future of humanity depends. But your teachers and masters do not tell you how you really think and are; nobody dares to voice the one criticism of you which could make you capable of governing your own fate. You are "free" only in one sense: free from education in governing your life yourself, free from self-criticism.

Source: A Global Perspective: a Conversation With the Apostolic Nuncio, Archbishop Christophe Pierre https://www.thecatholictelegraph.com/a-global-perspective-a-conversation-with-the-apostolic-nuncio-archbishop-christophe-pierre/71427 (3 March 2021)

“Self-education is, I firmly believe, the only kind of education there is.”
"Science Past, Science Future" (1975) p. 208
General sources

Selena at School https://www.youtube.com/watch?v=kRhbKhD4gPI

"The Richest Poor; Edhi’s life in facts, quotes," http://aaj.tv/2016/07/the-richest-poor-edhis-life-in-facts-quotes/ July 9, 2016