I recently reviewed the Criterion Blu-ray for Andrei Tarkovsky's debut feature Ivan's Childhood. It was the third film from the Russian director I'd seen, following Solaris and his final film The Sacrifice, and of the three it was probably my favorite and certainly the most approachable and easily digestible.
In that review I noted the Ingmar Bergman quote discussing Ivan's Childhood of which he said, "My discovery of Tarkovsky's first film was like a miracle. Suddenly, I found myself standing at the door of a room the keys of which had, until then, never been given to me. It was a room I had always wanted to enter and where he was moving freely and fully at ease."
Video editor and cinema lover Nelson Carvajal (whose work I've featured before) used a different Bergman quote to introduce the following Tarkovsky retrospective he posted today: "The one who invented a new language, true to the nature of film, as it captures life as a reflection, life as a dream."
Watch the short, 3:41 minute video to find out what he was talking about.