Eliminating any manner of 'trick' answers (like a boat or telephone) enabling me to affect an escape, but assuming the question asks what is the one thing, if there could be only one, that you could have with you to pursue or enjoy for the rest of your life, my first thought was a guitar . . . but pondering the reality of having only one thing, one source, one input to pursue or enjoy a bit longer, I think I would take a set of Calvin's complete commentary on the Bible that includes his 'Institutes'. That way I would get the actual text of Scripture plus the comments and systematized implications of the text from one of the greatest minds and most devout believers ever. Of course, my choice is kind of suggestive of the seriousness, wordiness, and probably commonly perceived lameness of my answer.