I loved both books, for diffierent reasons. Catherine of Siena had more applicability for individual situations in lie; I love her conversationa about religions. She also stresses much about how much God loves us and the obligation of charity towards neighbours, as repayment fo our love. Actually, she talks about lots, paryer, marriage, how people benefit form different spiritual practises dependning on their needs.
I think I wrote this before, but she inspired me so much, that even thinking about the book, months after I read it, I feel inspired still by the recollection. It’s great for non-Catholics, beucase it speaks much to individuals and opportunities in everyone’s life. There are of course references to mass and confesions (but more about the nature of contrition for sins than the actual sacament), but it is not full with speicic Catholic practices that might amke the non-initiated go “huh?” Although there is a chapter on priests; their obligations and how God is aware of those who have severe shortcomings and he will deal with them, bu thsi can refer to any religious leader.
As for Faustina’s Diary, the role of the Catholic Chruch is much more prominent, as she writes about her struggles in trying to get the Divine Office dveotion established, and talks about the way she interacts with people in her community. There are so many great messages of love and God’s mercy, but I wonder how much on-Catholics would believe them since they are private revelations and some are so skeptical of such things (even among the Catholics).
That is so great that your sister asked for them and you are sending them to her! Sounds like a great opportunity to bring her itno the Church. I think they are wonderful works to help her experience the richness of the Catholic faith.