Actually, St Teresa of Avila can be difficult to read, as the members of my OCDS group had shared.
Even she herself stated that she was not good a writing.
She often goes off on tangents and loses the reader before returning to her point.
So, her writings take a little getting use to. The first time I tried, I put it away for I wasn’t getting anything out of her Way of Perfection. Years later, after practicing Contemplative Prayer and joining an OCDS group, the Way of Perfection was our first work to read in formation. It came to life and I read her works throughout.
That being said, I prefer St John of the Cross, who along with Teresa founded the Discalced Carmelites. His writing style is much better, probably because he was better educated. However, the Living Flame of Love, became my favorite work by St John.
Either saint, it’s good to have some resources to help.
Fr Thomas Dubay did a good job in his book, “The Fire Within.”
In all, God leads, we follow. So, there are some souls who will be better fed through other works. A favorite of mine from my early days before Carmel was, "Francis: The Journey and the Dream, " by Murray Bodo O.F.M It was my first taste of contemplative practice.
Jim