Sunday 5 April 2009, 12.00

Krzysztof Zanussi, Poland 1973, 87 min

A student of physics searches for solid scientific paradigms and, ultimately, metaphysical explanations, eventually realizing that the state of mind suggested by the title will prove elusive. Combining elements of fiction and documentary, this film-essay puts the impossible ideal of philosophical illumination in confrontation with the clichés of everyday life, utilizing a shocking and extraordinary form.

Tate Modern  Starr Auditorium
£5 (£4 concessions), booking recommended