Metaphors connect an emotion to an image. (Remember, they do this without the use of as or like.) When you're creating your wedding ceremony, it's a helpful idea to find a metaphor that celebrates your relationship and your marriage. Our psyches like word pictures. If we find one we like, it will fasten and then remind us, every time we encounter the image of the emotion that we linked to it. The more common the image, the more the linkage will be reinforced in our daily lives. The more a metaphor is reinforced in our daily lives, the greater the meaning it will impart in our marriages. If you use the metaphor either in or in close proximity to your wedding vows, you strengthen your vows as well.
When you're creating your wedding ceremony, you want to reinforce the notion that love is ubiquitous and that your relationship thrives in the every day. Marriage is an every day activity. The metaphor you choose to illustrate your love in your wedding ceremony should be frequently encountered.
Why? Well, if something is too exotic in your life, then your chances of encountering it are slimmer. You loose the reinforcement that common activities offer. Using an image that involves the life-cycle of a camel if you live in Rhode Island, even if it can be made gloriously beautiful, is not going to provide the daily reinforcement that the tides of the sea or the changing of the seasons might.
So choose a metaphor to describe your relationship that has value and frequency in your life. Give it an important place in your wedding ceremony so that your community can understand how you're thinking about this relationship. Support your wedding vows with the image. This will allow it to be something more than poetic beauty; it will make it a marital aid. May the tides of your Love lap endlessly at the shores of your marriage.