ref. to the movie thread "why don't people ask the big questions" - i think these
3 are a good starting point - jean cocteau in le sang d'un poete tells us that
"mirrors should reflect more before sending back images" and jean cocteau certainly reflected before being that mirror of ours who sent images back to us from the depths of the sub-conscious - so surrealist in that he explored what lives inside the mirror and that's so exciting.
i love maya deren who is pictured above in a mirror and she holds one up to ourselves and explores what makes us behave in the ways we behave but in a different way to cocteau in that it isn't what is hidden deep inside the mirror or the mind that effects us but the society
outside the mind which shapes it ritualistically - it's not about hidden monsters but rhythms and rituals and numbers and patterns - she was an amazing woman, poss. my favourite of all time.
and finally ingmar bergman who dealt with the big questions humans have been asking since we started thinking his films are so emotionally expansive that they touch on every emotional dilemma i can think of and what stories and what cinematography and what characters!