Correct. In fact, any 'visitation' or apparition is the collective agreement of all possible realities unanimously for a (or many) individuals to come observe. They cannot drink, eat, touch things as little as possible, taking care not to disturb even a trail of ants from going along.

Kind of like downloading a map to a game you like to play. You place the map in the save folder, and bim! you can play. its the same principle. You need the right version, possibly a code to a specific time and style of map.. the only difference is that by changing anything, you risk unraveling the reality that the future self had, hence ceases to be, but then, since they never existed, they never came back, and thus re exist. Good for a mind bend, but apparently, i was visited by me from the future, with the message i needed to hear. i can elaborate if necessary, but basically, wanted to let you know, that indeed its that principle ; )