As Bion says: every session attended by the analyst must have no history and no future. What is 'known' about the patient is of no further consequence: it is either false or irrelevant. If it is 'known' by patient and analyst, it is obsolete. The only point of importance in any session is the unknown. Nothing must be allowed to distract from intuiting that. In any session, evolution takes place. Out of the darkness and formlessness something evolves.​