"I have often thought if the minds of men were laid open, we should see but little difference between that of the wise man and that of the fool. There are infinite reveries, numberless extravagances, and a perpetual train of vanities which pass through both. The great difference is, that the first knows how to pick and cull his thoughts for conversation, by suppressing some, and communicating others; whereas the others let them all indifferently fly out in words.
This sort of discretion, however, has no place in private conversations between intimate friends. On such occasions the wisest men very often talk like the weakest; for indeed the talking with a friend is nothing else but thinking aloud."
I agree with this quote as a generality; I think often young people think that older people are of a completely different mind set and because of that, they are reluctant to engage them in conversation. This is not to suggest that there is no maturing, no developing tastes for higher interests; but rather to point out that all mankind is in a struggle to leave behind foolish things, and if we knew the hearts of men like an open book, we would be surprised to see how little difference there really is. It makes me smile to catch an old couple talking when they think they are alone, the guard comes down, minds are unfettered, and their youth is on display. But once you enter the room, their conversation is culled and picked for general audience :)
Addison, photo by Marco Ruggiero