“The old believe everything; the middle-aged suspect everything; the young know everything.”
“Young believes everything, middle-aged suspects everything , old knows everything”
“I am not young enough to know everything.”
“I'm too old to know everything”
“I always like to know everything about my new friends, and nothing about my old ones.”
“Nowadays people know the price of everything and the value of nothing.”
“The public have an insatiable curiosity to know everything, except what is worth knowing.”