Alphonsus de Liguori 
Great Means of Salvation and of Perfection [PDF ebook] 
Prayer-Mental, Prayer-the Exercises of a Retreat-Choice of a State of Life, and the Vocation to the Religious State and to the Priesthood

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. I. Is it good and useful to have recourse to the intercession of the saints? 34. 2. Is it good to invoke also the souls in Purgatory? 36. 3. It is our duty to pray for the souls in Purgatory, 37. Is it necessary to invoke the saints? 41. IV. The intercession of the Blessed Virgin, 44. Conclu sion of the chapter, 49.