A quote from Stumbling on Happiness by Daniel Gilbert:

As much as the science might wish for it, there isn’t a view from nowhere. Once we have an experience, we are therefore unable to see the world as we did before. Our innocence is lost and we cannot go home again. We may remember what we thought or said (though no necessarily), and we may remember what we did (though not necessarily that either), but the likelihood is depressingly slim that we can resurrect our experience and then evaluate it as we would have back then. In some ways, the cigar-smoking, guitar-playing, pâté-eating people we become have no more authority to speak on behalf of the people we used to be than outside observers.