I believe there is no part of our lives, our adult as well as child life, when we're not fantasizing, but we prefer to relegate fantasy to children, as though it were some tomfoolery only fit for the immature minds of the young. Children do live in fantasy and reality; they move back and forth very easily in a way we no longer remember how to do.

As quoted in Questions to an Artist Who Is Also an Author : A Conversation between Maurice Sendak and Virginia Haviland (1972) by Virginia Haviland