A favorite symbol
Sometimes Bergman's symbols hit you over the head, sometimes they're a bit more subtle if not altogether subliminal.
One of my favorites is in "A Passion" - at the end of the movie, the little stuffed animal that dangles from Anna's rear view mirror as Andreas confronts her about her lies.
The dangling bear (or whatever it is) reminds the viewer of how Andreas found his dog and connects that cruelty to the cruelty that is going on in the car from Andreas, even though, yes, he's right that Anna likely killed her own husband and son - her own cruelty.
(Anna's followup, "I came to ask your forgiveness" is heartbreaking.)
So much going on in that scene. I guess that's why people would call it the climax.