Quote #3- Noam Chomsky

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

-Noam Chomsky   

Quote #2 - Friedrich Nietzsche

The surest way to corrupt the youth is to instruct him to hold in higher esteem those who think alike than those who think differently.  

-Friedrich Nietzsche 

Quote #1 - Leonardo Da Vinci

Looks without seeing, listens without hearing, touches without feeling, eats without tasting, moves without physical awareness, inhales without awareness of odor or fragrance, and talks without thinking    

-Leonardo Da Vinci on the human mind