Seventh Seal [Ending]

I find it pretty amazing that they made the film in a month, with all its great shots and everything. The film doesn't necessarily argue for or against the existence of God. It presents all the different viewpoints you can have and sort of lets you choose for yourself. Jons, the existentialist, thinks there is no meaning in life, as he states several times in the film. Antonious Bloch is unsure of whether God exists and goes to great lengths to find out, including asking the 'witch' where the Devil is.
When Jof sees Antonious Bloch play chess with Death, he is able to see Death while his wife is not. I was wondering why? I thought maybe when it is your time, you are able to see Death and it was Jof's time, but then he doesn't die in the end so I ditched the idea. The silent girl, who says "It is finished," at the end is significant, but I'm not sure why she was the one who accepted death since we don't know anything about her.
The end of the film is the scene where they are all eating and Death comes to them; then Jof sees them doing a dance with death - implying that they have not escaped him. If the knight's friends, like Lisa and her husband, had not been with them, would they have been able to put off Death a while longer? The knight's chess game with Death proves that you cannot escape Death; you may be able to stretch out the time in which you have to go with Death, but you will eventually die.