“The noblest pleasure is the joy of understanding.”

“as a well-spent day gives, joy in sleepso a well-spent life brings, joy in dying”

“Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.”

“Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind. So we must stretch ourselves to the very limits of human possibility. Anything less is a sin against both God and man.”

“You will never have a greater or lesser dominion than that over yourself...the height of a man's success is gauged by his self-mastery; the depth of his failure by his self-abandonment. ...And this law is the expression of eternal justice. He who cannot establish dominion over himself will have no dominion over others.”

“Learn how to see. Realize that everything connects to everything else.”

“He is a poor pupil who does not go beyond his master.”