Where Dreams Come From
About dreams. It is usually taken for granted that you dream of something that has made a particularly strong impression on you during the day, but it seems to me itīs just the contrary. Often itīs something you paid no attention to at the time - a vague thought that you didnīt bother to think out to the end, words spoken without feeling and which passed unnoticed - these are the things that return at night, clothed in flesh and blood, and they become the subjects of dreams, as if to make up for having been ignored during waking hours.
Boris Pasternak, in 'Doctor Zhivago'