DEFINITION:

Imagination - /ɪˌmædʒ·əˈneɪ·ʃn/ 

the ability to form mental pictures of people or things, or to have new ideas: 

Creative - /kriˈeɪ.tɪv/ 

producing or using original and unusual ideas

The Caterpillar and Alice looked at each other for some time in silence: at last the Caterpillar took the hookah out of its mouth, and addressed her in a languid, sleepy voice.

`Who are you?' said the Caterpillar.

This was not an encouraging opening for a conversation. Alice replied, rather shyly, `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.'

`What do you mean by that?' said the Caterpillar sternly. `Explain yourself!'

`I can't explain myself, I'm afraid, sir' said Alice, `because I'm not myself, you see.'

`I don't see,' said the Caterpillar.

`I'm afraid I can't put it more clearly,' Alice replied very politely, `for I can't understand it myself to begin with; and being so many different sizes in a day is very confusing.'

`It isn't,' said the Caterpillar.

`Well, perhaps you haven't found it so yet,' said Alice; `but when you have to turn into a chrysalis--you will some day, you know--and then after that into a butterfly, I should think you'll feel it a little queer, won't you?'

`Not a bit,' said the Caterpillar.

`Well, perhaps your feelings may be different,' said Alice; `all I know is, it would feel very queer to me.'

`You!' said the Caterpillar contemptuously. `Who are you?'

Chapter V. ‘Advice from a Caterpillar’

Some idiomatic expressions were born or popularised thanks to that novel such as:

‘Down the rabbit hole’ which means that you enter a bizarre, confusing or surreal situation that gets increasingly complex the deeper you go.

‘Mad as a hatter’ means that somebody is completely insane or eccentric

‘Through the Looking-Glass’ means that a situation is the opposite of what is normal or expected resulting in a strange and alternate reality.

‘Cheshire cat Grin’ means a mysterious, mischievous or broad smile

‘We’re all mad here’ is a tongue-in-cheek way of acknowledging that everyone has their own quirks or irrationalities about them.