Marcellin was sent on a mission to go to a 16 year old named Jean Baptiste Montange and hear his confessions.
Jean was dying and he told Marcellin his sins and Marcellin found out he knew a little about the Catholic Faith but it never flourished because he never went to School and learned about.
This gave Marcellin and idea of opening the first Marist School
Let there be among you just one heart and one mind. Let it always be said of the Little Brothers of Mary as it was of the early Christians: See how they love one another!