Roman magistrates wore a long scarf when engaged in their official duties, just as our judges wear a court gown. Whenever a priest celebrates Mass or administers the Sacraments, he wears the stole as a sign that he is occupied with an official priestly duty. When placing the stole about his neck, in vesting for Mass, the priest begs God to give him on the last day the 'garment of immortality' that was forfeited by our sinful first parents.