No man was ever so completely skilled in the conduct of life, as not to receive new information from age and experience: insomuch that we find ourselves really ignorant of what we thought we understood, and see cause to reject what we fancied our truest interest.
[tr. Steele (1712)]

Never could there be anyone with a method for life so well drawn up, but that circumstance, time, experience ever brings something new, teaches something; so that you know not those things which you think that you know, and that you repudiate in experience the things which you have thought essential for you.
[tr. Giles, c. 1850]

Never was there any person of ever such well-trained habits of life, but that experience, age, and custom are always bringing him something new, or suggesting something; so much so, that what you believe you know you don't know, and what you have fancied of first importance to you, on making trial you reject.
[tr. Riley (1874)]

However well a man may have calculated his scheme of life, still circumstances, years, experience, always introduce a new element and teach new lessons. You find that you don't know what you thought you did know, and what you thought of primary importance that in practice you reject.
[tr. Sargeaunt (Loeb) (1912), Act 6]

You never add things up so well in this life that something unexpected doesn’t turn up and set you wondering -- some money matter, some event, some personal problem. As a result, you find you don’t know what you thought you knew, and things that seemed fine turn out to be worthless when they're put to the test.
[tr. Copley (1967)]

No matter how neatly you keep your accounts in life,
experience, age, and circumstance always show up
to toss something new on the books and teach you a lesson.
You find out you don't know what you thought you did, and what seemed
so important in theory turns out to be pointless in practice.
[tr. Berg/Parker (1999)]

There never was a person so well-bred
And so refined but that into his head
Come new thoughts springing from experience
And age and custom, so that what you sense
You know you don’t know and what you before
Believed was most important you abhor.
[tr. Kelk (2022)]

Often in early youth an opinion or custom seems absurd to us, which, with advancing years, we discover has some justification and so appears less absurd. Ought we to conclude from this that certain customs are not so ridiculous as others? One might sometimes be tempted to think that they were established by people who had read the book of life through, and that they are judged by those who, despite their intelligence, have only glanced at a few pages.
[tr. Hutchinson (1902)]

Often an opinion or custom seems absurd to us in early youth; but as we advance in life we see the reason for it, and it appears less fatuous. Must we conclude from this that certain customs actually are less absurd? One is sometimes led to suppose that they have been established by folk who have read the whole of the book of life, and that they are criticized by those who, in spite of their intelligence, have only read a page or two at best.
[tr. Mathers (1926)]

Often an opinion, a custom, seems absurd to begin with, when one is very young, and as one advances in life one learns the reason for it, and it seems less so. Must one conclude, then, that certain customs have become less ridiculous? At times one is drawn to the conclusion that they were established by persons who had read the book of life entire, and are judged by others who have read only a few pages.
[tr. Merwin (1969)]

Often an opinion, or a custom, begins to seem absurd in one's early youth, and, as life advances, one finds the reason for it; it seems less absurd. Is one ot conclude that certain customs are less ridiculous? One would sometimes be inclined to think that they had been laid down by people who had read the entire book of life, and that they are judged by people who, in spite of their intellect, have only read a few pages of it.
[tr. Pearson (1973)]

To the very young some opinions or customs seem absurd, but as you grow older you realize the reason behind them and they seem less absurd. Are we to conclude that certain customs aren't as ridiculous as they seem? There are times when you feel that they've been created by people who've read the book of life from cover to cover and that they're being judged by those who, however intelligent, have read only a few pages.
[tr. Parmée (2003), ¶ 20]

Mrs. Darling came to the window, for at present she was keeping a sharp eye on Wendy. She told Peter that she had adopted all the other boys, and would like to adopt him also.
“Would you send me to school?” he inquired craftily.
“Yes.”
“And then to an office?”
“I suppose so.”
“Soon I should be a man?”
“Very soon.”
“I don’t want to go to school and learn solemn things,” he told her passionately. “I don’t want to be a man. O Wendy’s mother, if I was to wake up and feel there was a beard!”
“Peter,” said Wendy the comforter, “I should love you in a beard;” and Mrs. Darling stretched out her arms to him, but he repulsed her.
“Keep back, lady, no one is going to catch me and make me a man.”

“It was because I heard father and mother,” he explained in a low voice, “talking about what I was to be when I became a man.” He was extraordinarily agitated now. “I don’t want ever to be a man,” he said with passion. “I want always to be a little boy and to have fun. So I ran away to Kensington Gardens and lived a long long time among the fairies.”

It is a very immature thing to worry about one’s stinking youth, but I don’t care: I think age is a very high price to pay for maturity.

When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.
[KJV (1611)]

When I was a child, my speech, feelings, and thinking were all those of a child; now that I am an adult, I have no more use for childish ways.
[GNT (1976)]

When I was a child, I used to talk like a child, and see things as a child does, and think like a child; but now that I have become an adult, I have finished with all childish ways.
[NJB (1985)]

When I was a child, I used to speak like a child, reason like a child, think like a child. But now that I have become a man, I’ve put an end to childish things.
[CEB (2011)]

When I was a child, I spoke like a child, I thought like a child, I reasoned like a child. When I became an adult, I put an end to childish ways.
[NRSV (2021 ed.)]

JANE: Why can't you fly now, Mother?
WENDY: Because I'm grown up, sweetheart; when people grow up they forget the way.
JANE: Why do they forget the way?
WENDY: Because they are no longer young and innocent. It is only the young and innocent that can fly.