Sentence:  I actually find Parfit's picture of "survival" depressing, but that of course is by comparison with what "I" take "survival" to be. By <WSD>Parfitian survival</WSD>, Parfitian death may may not seem so depressing. 
Meaning of the word marked with <WSD> tags:  The state of remaining as one's original self after the bodily self has been amalgamated or deconstructed through time and experience.