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

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

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

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

“Knowing others is wisdom, knowing yourself is enlightenment.”

“All the world's a stage, and all the men and women merely players.”

“The truth is rarely pure and never simple.”

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