"'THE WORK of our redemption is continued, and its fruits are imparted to us during the celebration of the liturgy,' says Pope Pius XII in his encyclical Mediator Dei. In this book will be found some account of the work of our redemption precisely under this aspect of its continuation and application through the liturgy. The first part deals with some underlying principles and with the seven sacraments; the second part treats of 'the crowning act of the sacred liturgy', namely, the sacrifice of the Mass." (From the Author's Preface) The articles contained in this volume are suitable for readers who have no liturgical background, helpful for the beginner, and useful for those who desire to spread the knowledge of the liturgy.