Some ideas for anniversary wishes are: "May you live as long as you wish and love as long as you live," by Robert Heinlein, and "Real love stories never have endings," by Richard Bach. Andre Maurois said, "A happy marriage is a long conversation that always seems too short."
Other ideas include, "The echo of your love and the sound of the sea have a few things in common: they are both constant and eternal. Happy anniversary," and "Most couples devote all their time to work in order to achieve success. But you both have the perfect balance of seeking success through work, love and happiness. Happy anniversary."