As a lifelong single I see the marriages of my friends and family as a gift for learning more about life in Christ. Here is why.
Marriage is not an end in itself but offers a picture of the ultimate marriage. Throughout the Bible God uses marriage to explain what it means to be united to him in Christ by the Spirit. In fact most covenants in the Bible engage either directly or indirectly this marriage of Yahweh to his bride, the collective people of faith who love him. God invites us to an eternal union and communion with him and human marriage allows us to learn of his heart for us. This is a present reality and not just a future promise.
See the balance of this post on the Cor Deo website at Marriage and Ministry