Interesting article.
I was simply stunned when I came across Fr. Lagrange's work The Three Ages Of The Spiritual Life. It is so easy to understand, and at the same time is has depth. Most Catholics, even Traditionalists, have no knowledge at all about the beautiful things discussed in this book.
As a good retarded soul, I did not give the necessary importance to the book. Only recently I was able to get a real book and not a pdf file of this work.
If you give it the attention it deserves, The Three Ages Of The Spiritual Life will change your life.