Every day things happen in the world that cannot be explained by the physical laws we know. Every day they are spoken of for a few minutes, forgotten, and the same mystery that brought them carries them away, transforming the secret into forgetting. Such is the law of things that have to be forgotten because they cannot be explained. In the sunshine the visible world continues to be normal. Something alien observes us from the shadows.

— Bernardo Soares (Fernando Pessoa), The Book of Disquiet