L. Frank Baum

“ Then I thought, as the country was so green and beautiful, I would call it the Emerald City; and to make the name fit better I put green spectacles on all the people, so that everything they saw was green."
"But isn't everything here green?" asked Dorothy.
"No more than in any other city," replied Oz; "but when you wear green spectacles, why of course everything you see looks green to you. The Emerald City was built a great many years ago, for I was a young man when the balloon brought me here, and I am a very old man now. ”

“ I cannot tell you how to use them, however; you must find that out for yourself."
"Oh, thank you—thank you!" cried the Scarecrow. "I'll find a way to use them, never fear!"
"But how about my courage?" asked the Lion anxiously.
"You have plenty of courage, I am sure," answered Oz. "All you need is confidence in yourself. There is no living thing that is not afraid when it faces danger. The True courage is in facing danger when you are afraid, and that kind of courage you have in plenty." ”

“ But my people have worn green glasses on their eyes so long that most of them think it really is an Emerald City, and it certainly is a beautiful place, abounding in jewels and precious metals, and every good thing that is needed to make one happy. I have been good to the people, and they like me; but ever since this Palace was built, I have shut myself up and would not see any of them.
"One of my greatest fears was the Witches, for while I had no magical powers at all I soon found out that the Witches were really able to do wonderful things. ”