All good things must end
all good things must (come to an) end
proverb It is inevitable that good experiences will eventually end. I know you're sad to graduate, but all good things must come to an end. Knowing that all good things must end doesn't make it any easier to go home after a vacation!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
All good things must (come to an) end.
Prov. All experiences, even pleasant ones, eventually end. It's time to leave the party, honey. All good things must end. We've had a lovely visit, but all good things must come to an end.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.