This is a traditional Catholic French Pilgrim song which is very beloved among scouts. The words "E Ultreïa" are actually only part of an ancient saying Pilgrims would greet each other with along the way to Santiago de Compostela, one would say "E ultreia" (Farther!) and recieve the response "E suseia!"(Higher!) thus do the pious souls encourage one another to seek God with greater fortitude.