It is not essential to meditate on the fifteen mysteries every month. In her correspondence, Sister Lucia indicates her own way of doing it: every month she meditates on a mystery according to the method taught in the Exercises of Saint Ignatius. “For example, the first month, the Annunciation, the second month, I do the meditation of the second joyful mystery. The third, the third, etc., following the same method of meditation. When I finish these first five Saturdays, I start five more and meditate on the sorrowful mysteries, then the glorious ones, and when I finish them, I start again with the joyful ones.”