"Thinking is the hardest work there is, which is probably the reason so few engage in it."

"I take nothing for granted. I now have only good days, or great days."

"Learning is not attained by chance; it must be sought for with ardor and attended to with diligence."

"It is never too late to be what you might have been." -- George Eliot

"Your own mind is a sacred enclosure into which nothing harmful can enter except by your permission." -- Ralph Waldo Emerson

"The 'if' thinker broods over a difficulty or a setback. The 'how' thinker wastes no energy on postmortems when trouble or even disaster hits him. He immediately starts looking for the best solution."