Each year, the Church celebrates the Mysteries of Christ's birth, life, death and Resurrection. These are the seasons of Advent, Christmas, Lent, Holy Week, and Easter - and each is the source of a particular grace, each has its own special gift for us. Christ in His Mysteries is Blessed Columba Marmion's great meditation on the treasure-house of grace Christ offers to us in the Church's liturgical year. In the clear inspiring language that made him a favourite of Popes and lay faithful alike he explains: