 Passavant founded and administered a variety of benevolent institutions, particularly in his native country's industrializing cities.He noted the comparable apostolic deaconesses, as well as the Sisters of Charity (a Roman Catholic order founded by St. Vincent DePaul), the Mennonite nursing deaconesses in the Netherlands, and Elizabeth Fry's work in England.The sabbatical also convinced Passavant of the importance of the Augsburg Confession in Lutheran doctrine.