“It must be inconvenient to be made of flesh,' said the Scarecrow, thoughtfully, 'for you must sleep, and eat and drink. However, you have brains, and it is worth a lot of bother to be able to think properly.”
“Scarecrow: I haven't got a brain... only straw. Dorothy: How can you talk if you haven't got a brain? Scarecrow: I don't know... But some people without brains do an awful lot of talking... don't they? Dorothy: Yes, I guess you're right.”
“I think,' said the little Queen, smiling, 'that your friend must be the richest man in all the world.' 'I am,' returned the Scarecrow; 'but not on account of my money. For I consider brains to be far superior to money, in every way. You may have noticed that if one has money without brains, he cannot use it to advantage; but if one has brains without money, they will enable him to live comfortably to the end of days.' 'At the same time,' declared the Tin Woodman, 'you must acknowledge that a good heart is a thing that brains cannot create, and that money cannot buy. Perhaps, after all it is I who am the richest man in all the world.' 'You are both rich, my friends,' said Ozma gently; 'and your riches are the only riches worth having - the riches of content!' - The Marvellous Land Of Oz by L. Frank Baum pg 192 chapter 24”
“The Scarecrow watched the Woodman while he worked and said to him "I cannot think why this wall is here nor what it is made of." "Rest you brains and do not worry about the wall," replied the Woodman, "when we have climbed over it we shall know what is on the other side.”
“I cannot understand why you should wish to leave this beautiful country and go back to the dry, gray place you call Kansas.""That is because you have no brains," answered the girl. "No matter how dreary and gray our homes are, we people of flesh and blood would rather live there than in any other country, be it ever so beautiful. There is no place like home." The Scarecrow sighed."Of course I cannot understand it," he said. "If your heads were stuffed with straw, like mine, you would probably all live in beautiful places, and then Kansas would have no people at all. It is fortunate for Kansas that you have brains.”
“Can't you give me brains?" asked the Scarecrow."You don't need them. You are learning something every day. A baby has brains, but it doesn't know much. Experience is the only thing that brings knowledge, and the longer you are on earth the more experience you are sure to get.”
“If you only have brains on your head you would be as good a man as any of them, and a better man than some of them. Brains are the only things worth having in this world, no matter whether one is a crow or a man.”