"Learning never exhausts the mind."

"The noblest pleasure is the joy of understanding."

"Study without desire spoils the memory, and it retains nothing that it takes in."

"I have been impressed with the urgency of doing. Knowing is not enough; we must apply."

"The smallest feline is a masterpiece."

"He who is not curious will not learn. He who does not learn will not grow."

"Ask me — but why? — and I will tell you: because there are more good answers in the asking than in the not-asking."