TO-DAY we begin the work of Advent. During these weeks of preparation for the great feast of Christmas it is usual and useful to turn our thoughts to some of the great principles upon which our faith as Catholics is grounded, in order that we may realise more fully all that our Blessed Lord's coming into this world has done for mankind in general and for our individual souls in particular. It will not therefore be altogether foreign to this purpose if during these Sundays of Advent I ask your consideration of certain Catholic principles which appear to me to have been deliberately abandoned in the great religious revolution of the sixteenth century, known as the Reformation, but to which our Catholic forefathers in England and in Ireland clung with heroic constancy and for which they suffered loss of worldly goods and even laid down their lives.