Roger Ebert writes as he adds
Terrence Malick's Tree of Life to his list of greatest films of all time,
I believe it's an important film, and will only increase in stature over the years.
In his original review, he wrote
Terrence Malick's "The Tree of Life" is a film of vast ambition and deep humility, attempting no less than to encompass all of existence and view it through the prism of a few infinitesimal lives. The only other film I've seen with this boldness of vision is Kubrick's "2001: A Space Odyssey," and it lacked Malick's fierce evocation of human feeling. There were once several directors who yearned to make no less than a masterpiece, but now there are only a few. Malick has stayed true to that hope ever since his first feature in 1973.
But my favorite part of his review nails exactly what Tree of Life captures:
That's how you grow up. And it all happens in this blink of a lifetime, surrounded by the realms of unimaginable time and space.