The cliche' tying the knot is centuries old. In the middle
ages, it was believed tying "the knot" would have a
positive influence on the marriage. The Nuptial Knot
has brought an old custom into the 21st century.
The two separate ends looped over into a knot
represents two becoming one. To tie means to "bind".
The knot means to secure, so when you tie the knot
you are symbolically bonding and securing your marriage
and you have a precious keepsake to cherish forever.