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

This quote is attributed to Niles Crane.

The mind must be exercised as rigorously as the body. - Niles Crane

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

Niles Crane Education

"I'm not drinking to escape reality, I'm drinking to enhance it."

"The mind is a terrible thing to waste, but a wonderful thing to refine."

"One must maintain certain standards, or civilization crumbles."

"Love is the most exquisite torture known to mankind."

"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."