You’ve been using my body when I was asleep? - W. Bruce Cameron

As for me: I loyally remained right where I was, remembering the very first I had ever seen the boy and then just now, the very last time-and all the times in between. The deep aching grief I knew I would feel would come soon enough, but at that moment mostly what I felt was peace, secure in the knowledge that by living my life the way I had, everything had come down to this moment.
I had fulfilled my purpose.

failure isn’t an option if success is just a matter of more effort.

The job of a good dog was ultimately to be with them, remaining by their sides no matter what course their lives might take. All I could do now was offer him comfort, the assurance that as he left this life he was not alone but rather was tended by the dog who loved him more than anything in the whole world.