In his petition to Pope Leo XII for approbation, Eugene continued by marveling at the results of their ministry. It was ony possible for God to work through the Oblates if they themselves lived on the presence of the God they wished to communicate. In order to do this effectively a Rule of Life was needed as a spiritual companion and guide.
They themselves have been struck by the wonders that grace has achieved through their ministry. They feel that to become worthy of their vocation, they must walk in the footsteps of the Saints; that the members of their Society must have the possibility of working at their perfection and at the same time, they would provide the people with the means of salvation by preaching conversion to them.
They have resolved to embrace the evangelical counsels and to devote themselves totally to whatever would promote the greatest glory of God, the salvation of the most abandoned souls, and the service of the Church.
The Rules and Constitutions of the Society of the Missionary Oblates of Saint Charles (which is the name they had taken), commonly known as the Missionaries of Provence, have been drawn up in this spirit.
Petition to His Holiness Pope Leo XII, 8 December 1825, EO XIII n. 48
