Greatest film ever? I don't think so, but Tarkovsky's films transcend their subject matter because the images loosen and expand time to where, like the man's reply stated, his films ARE in the journey. Tarkovsky was essentially a spiritual filmmaker. "Andrei Rublev" is a repository of ineffable insight, and yes it has receded a bit, yet it still mobilizes the fluidity and and resonance of a dream, like all great spiritual films. I would watch it again, maybe after watching "Stalker" or "Solaris" to see if Tarkovsky is your cup of tea. You don't have to like ALL foreign directors, you know.