"What is now proven was once only imagined."
William Blake

 
"A mind that is stretched by a new experience can never go back to its old dimensions."
Oliver Wendell Holmes

"The scars you acquire while exercising courage will never make you feel inferior."
D.A. Battista
 

"You must give some time to your fellow men. Even if it's a little thing, do something for others - something for which you get no pay but the privilege of doing it."
Albert Schweitzer

"Real knowledge is to know the extent of one's ignorance."
Confucius
 

 
"I was always looking outside myself for strength and confidence, but it comes from within. It is there all the time."
Anna Freud
 

"The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge."
Daniel J. Boorstin