Exchanging of the Rings The exchanging of the rings is a demonstration of the couple's promise to stay faithful. The ring represents eternity. By wearing the wedding bands throughout the couple's lifetime, they tell all others that they are committed to stay together and remain faithful to each other. The lighting of the unity candle symbolizes the union of two hearts and lives. Incorporating a unity candle ceremony or other similar illustration can add deep meaning to your wedding service. Christians often choose to incorporate Communion into their wedding ceremony, making it their first act as a married couple.