18. Your life is before you. Be careful of the choices you make now that you could regret later. This regret is the subject of an old poem whose author has been forgotten. I hope you’ll never have reason to apply it to yourself.

Across the fields of yesterday,
He sometimes comes to me
A little lad just back from play-
The boy I used to be.
He looks at me so wistfully
When once he’s crept within;
It is as if he hoped to see
The man I might have been.

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