There's another way to edit the sentence, which is to add a comma before the second 'which.' The survivor is struggling toward 'some resolution,' not a specific resolution that the mind may never find. The final clause is an appended thought, not a conclusion of the previous clause: 'Death ends a life, but it does not end a relationship, which struggles on in the survivor's mind toward some resolution, which it may never find.'
Robert AndersonAll you're supposed to do is every once in a while give the boys a little tea and sympathy.
Robert AndersonThe Cross was the manifestation of Divine love without reserve or limit; but it was also the expression of man's unutterable malignity.
Robert AndersonI shall await the first shot, and if you do not batter us to pieces, we shall be starved out in a few days.
Robert Anderson