8 We have no intention, Venerable Brethren, of taking up each and every matter that has any reference to the life of a priest in the present day; as a matter of fact, following closely in the footsteps of St. Pius X, "We will not say anything that you have not already heard before, nor anything that will be completely new to anyone, but rather We will concentrate on recalling things that everyone ought to remember."(9) For a mere sketch of the qualities of this Heavenly soul, if done properly, is enough to lead us readily to a serious consideration of certain things that are, it is true, necessary in every age, but which now seem to be so important that Our Apostolic office and duty force Us to put special emphasis on them on the occasion of this centenary.
Source: Sacerdotii Nostri Primordia (Vatican.va)