Trillian

"Maybe you're just a tortoise who thinks he's a god."
"Nah. Don't try philosophy again. Start thinking like that and you end up thinking maybe you're just a butterfly dreaming it's a whelk or something. No. One day all I had on my mind was the amount of walking necessary to get to the nearest plant with decent low-growing leaves, the next... I had all this memory filling up my head. Three years before the shell. No, don't you tell me I'm a tortoise with big ideas."