"Retire from work but not from life" and "Don't simply retire from something, have something to retire to" are two quotes that can be used for retirement wishes. It is quite common for family and friends of the retiree to toast the guest of honor at a retirement party.
For many, retirement is a welcome reward after toiling in the workforce for years. A retirement party is an honorable way to send the retiree off on the next phase of his or her life. When making a toast or even writing a card of congratulations, heartfelt retirement wishes give it a special personal touch.
Keep in mind the demeanor and personality of the retiree. For example, some may have a bit of trepidation when thinking about those empty retirement years. George Barnard Shaw's quote, "The only way to avoid being miserable (in retirement) is not to have enough leisure to wonder whether you are happy or not," is an appropriate one to use in this case. It tells the guest of honor to keep busy if he or she is worried about having lots of time but not lots to do.
Retirement may be a sentimental time for some and, in that case, a humorous quote adds a touch of levity. "I'm now free as the breeze with roughly the same income" from Gene Perrett or, "Retirement: the world's longest coffee break" by an unknown author works well in this situation.