Everything has to come to an end, sometime.

To 'know Thyself' is considered quite an accomplishment.

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

A curious thing about Ugu the Shoemaker was that he didn't suspect in the least that he was wicked. He wanted to be powerful and great, and he hoped to make himself master of all the Land of Oz that he might compel everyone in that fairy country to obey him, His ambition blinded him to the rights of others, and he imagined anyone else would act just as he did if anyone else happened to be as clever as himself.

I think you are wrong to want a heart. It makes most people unhappy. If you only knew it, you are in luck not to have a heart.

I can't give you a brain, but I can give you a diploma.

But you will admit that it's a good thing to be alive.