Night Watch is a fantasy novel by British writer Terry Pratchett, the 29th book in …
That was always the dream, wasn’t it? ‘I wish I’d known then what I know now’? But when you got older you found out that you now wasn’t you then. You then was a twerp. You then was what you had to be to start out on the rocky road of becoming you now, and one of the rocky patches on that road was being a twerp.
— Night Watch (Discworld, #29; City Watch, #6) by Terry Pratchett (Page 135)