Old age brings along with its uglinesses the comfort that you will soon be out of it, - which ought to be a substantial relief to such discontented pendulums as we are.
The traits the word 'childish' addresses are seen so often in adults that we should abolish this age-discriminatory word when it comes to criticizing behavior associated with irresponsibility and irrational thinking.
"There's been a quantum leap technologically in our age, but unless there's another quantum leap in human relations, unless we learn to live in a new way towards one another, there will be a catastrophe."
From time to time, little men will find fault with what you have done...but they will go down the stream like bubbles, they will vanish. But the work you have done will remain for the ages.