Who said "The mind must be trained as rigorously as the body."?

This quote is attributed to Yinsen.

The mind must be trained as rigorously as the body. - Yinsen

"The mind must be trained as rigorously as the body."

Yinsen Education

"A man can change his face, but he cannot change his heart."

"Even in darkness, we must find a reason to build, not destroy."

"The mind is a weapon more powerful than any bomb."

"When you have nothing, you discover what truly matters."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."