By Adelaide Mena, CNA/EWTN News - Walk along in the March for Life and you may see them… They are the Sisters of Life and they have a message for women and for the pro-life movement: “You are not alone.”.. “We really see ourselves primarily as a spiritual entity that intercedes for and upholds the work of the pro-life movement,” explained Sr. Mary Elizabeth, SV, Vicar General of the Sisters of Life.