The test of time?

Which books deserve to be called classics? Anthony Scaramucci in From Wall Street to the White House and Back (probably the strangest self-help book you’ll ever read!) touts reading classics, defining them as works that have stood the “test of time.” (Surprised I read this book? It’s a profound and yet sometimes hilarious book that I can strongly recommend despite not sharing the author’s political proclivities.) I suppose that definition is okay as far as it goes…but whose test, how long a time...