tree of life, and the sadness that lingered

I want to see Tree of Life. Again. Now. Sure, watching it made me cry, and the sadness that came with it lingered. Until now. I still feel it. Everytime I think of the movie, and the scenes I love in it, I'd feel bad. Sometimes it's not just sadness. It's something different. Something I don't know what to call, or name. What's weird is that I don't think I totally get what the movie really was about. I have things in mind but it could be different from what the writer has in his. However, I felt it. My heart understood.