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

“Learning never exhausts the mind.”

“Knowing yourself is the beginning of all wisdom.”

“Things do not change; we change.”

“Experience is simply the name we give our mistakes.”

“The two most important days in your life are the day you are born and the day you find out why.”

“We know what we are, but know not what we may be.”

“Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.”