One example of a quote that is suitable for a card for a co-worker is, "Painful though parting be, I bow to you as I see you off to distant clouds," from Emperor Saga, who was the 52nd emperor of Japan. Another example is, "The world is round and the place which may seem like the end may also be the beginning," by Ivy Baker Priest who was the was Treasurer of the United States during the 1950s.
When buying a farewell card for a co-worker, choose something that suits his personality. Giving a co-worker a card that he won't understand or appreciate makes it less memorable and meaningful, explains Made Man. Have other close co-workers sign the card with best wishes for the future or jokes about the time spent working together, but make sure the messages are professional and not offensive.
In addition to giving a departing co-worker a card, it is a good idea to take him out to lunch or buy him a cake and have a small farewell party. Set aside time for everyone at the lunch or party to say something nice to the person, and give him the card after the farewell gathering.