Scorsese (thoughts on the film circa '01)
Basically, in one exquisitely beautiful image after another, you're watching the progress of a man as he moves from the purest innocence to the coldest sophistication, ending in absolute bitterness - and it's all a matter of simple, elemental survival. It's a terrifying film because all the candlelit beauty is nothing but a veil over the worst cruelty. But it's real cruelty, the kind you see every day in polite society.
His audacity is to insist on slowness in order to recreate the pace of life, and to ritualize behavior of the time. A great example is the seduction scene, which he stretches until it settles into a sort of trance, what always struck me is the ballet of emotions of the film, watch the tension between the camera's movements and the characters body language orchestrated by the music in the scene.