I saw this movie as a very young man with a father who was growing very old. Even then it worried me as it reminded me of my relationship with my own father who had complained that we weren't spending as much time together as in my boyhood. Remembering this film now with three grown sons makes me wonder if they suffer from the same contradictory feelings I had for my father at their ages.
And this is exactly what makes this film great. It essays the human condition in its stark reality.
Quite frankly I wouldn't have seen this film if I didn't know Gene Hackman from his French Connection series. Oh, I knew it would be some kind of very talky drama but just the same I wanted to see how he would do in such a story. He did very well.
If you are curious about the title see my question in the discussion board and the compleat answer by Cassandra.
If you like themes like this see also Death of a Salesman (the version with Frederic March) and Nothing in Common (Tom Hanks).