Alan Watts - Out Of Your Mind

"To go out of your mind at least once a day is tremendously important, because by going out of your mind you come to your senses." 

Paulo Coelho - The Alchemist

Lewis Carroll - Alice In Wonderland

"I–I hardly know, sir, just at present–at least I know who I WAS when I got up this morning, but I think I must have been changed several times since then."

"Alice had begun to think that very few things indeed were really impossible."