“Willpower is to the mind like a strong blind man who carries on his shoulders a lame man who can see”

“There is a wisdom of the head, and a wisdom of the heart. ”

“Nine-tenths of wisdom is being wise in time”

“Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young ”

“Small minds are concerned with the extraordinary, great minds with the ordinary”

“The mind is not a vessel to be filled but a fire to be kindled”