“It is easier to build strong children than to repair broken men.”

“I am not bound to win, but I am bound to be true.”

“Courage is resistance to fear, mastery of fear, not absence of fear.”

“An investment in knowledge pays the best interest.”

“You have power over your mind, not outside events. Realize this, and you will find strength.”

“Real knowledge is to know the extent of one's ignorance.”

“The only true wisdom is in knowing you know nothing.”

“Learning never exhausts the mind.”