“To forget is the secret of eternal youth. One grows old only through memory. There's much too little forgetting.”
Source: Three Comrades
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Erich Maria Remarque 63
German novelist 1898–1970Related quotes
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 439.

Antithesis
The Note-Books of Samuel Butler (1912), Part IV - Memory and Design

Wars I Have Seen (1945)

“That's the real trouble with the world, too many people grow up. They forget.”
From Walt Disney World: Then, Now, & Forever: Too many people grow up. That's the real trouble with the world, too many people grow up. They forget. They don't remember what it's like to be 12 years old. They patronize, they treat children as inferiors. Well, I won't do that. I won't do that. I'll temper a story, yes. But I won't play down, and I won't patronize.
The Quotable Walt Disney (2001)
Context: That's the real trouble with the world, too many people grow up. They forget. They don't remember what it's like to be twelve years old. They patronize; they treat children as inferiors. I won't do that. I'll temper a story, yes. But I won't play down, and I won't patronize.

“Forget the word youth – this is one of the best bands you'll ever hear.”
Of the National Youth Jazz Orchestra Guardian, 18 Feb 2010 http://www.guardian.co.uk/theguardian/2010/feb/18/letter-john-dankworth-obituary

“The proper memory for a politician is one that knows what to remember and what to forget.”
Vol. II, bk. 4, ch. 2.
Recollections (1917)