My people have been wearing green glasses on their eyes for so long that most of them think this really is an Emerald City.

. . .It is the Law that while Evil, unopposed, may accomplish terrible deeds, the power of Good can never be overthrown when opposed to Evil. . .

It is worth a lot of bother to be able to think properly.

Oh, I see;" said the Tin Woodman. "But, after all, brains are not the best things in the world." Have you any?" enquired the Scarecrow. No, my head is quite empty," answered the Woodman; "but once I had brains, and a heart also; so, having tried them both, I should much rather have a heart.

Lions and tigers, and bears, oh my! - Dorothy in Wizard of Oz

The more one knows, the luckier he is, for knowledge is the greatest gift in life.

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.