The bride was once carried across the threshold so that she might be protected from any evil spirits lurking beneath the threshold. Since it was also necessary for the bride to avoid tripping or falling (signs of bad luck), transportation by the groom of his new bride in this manner ensured the safety and happines of the couple's new life together. If however, the bride chooses to cross the threshold without being carried, then she should step in with her right foot...not her left...in order to ensure good luck. Tradition also dictates that a bride should enter her new home by the main door.