What is Marriage?
Marriage is the uniting of one man and one woman by God, making them one flesh. Marriage is defined by the marriage covenant of salvation between Christ and the Church (see Ephesians 5:21-33)
Why do we have weddings in Church?
God instituted marriage and He unites man and wife in the wedding ceremony. We have weddings in Church because we come to God, that He might join us in marriage.
What does the Bible say about weddings?
There are many Scriptural references to weddings and wedding practices. The marriage of Christ and the church is foretold in Psalm 45, the Song of Songs, and many other Old Testament passages. There is also reference to wedding practices in Jesus parables (see Matthew 22:1-14; 25:1-13).
Suggestions
You may want to sing the following songs from Lutheran Service Book: 858, 859, 860.
Object Lesson
Get a small jigsaw puzzle. Make two halves but keep them a little apart. Then join them together. Teach them that God takes a man and a woman and joins them as one. God uses each to make the other greater. He blesses them through each other, and with the blessing of children.
Prayer
O Perfect Love, all human thought transcending, lowly we kneel in prayer before Thy throne, that theirs may be a love which knows no ending, whom Thou forevermore dost join in one. Amen.