If I were to attempt to summarize this book in one word, it would be simple; not simple as in the way you may assume, but simple as in sublime, pure, and true. This is a work of love, as well as learning. The author, a well known teacher of philosophy, takes us past the conventional and into a world of traditional thought; what you may call the Judeo-Christian world view. Dr. Kreeft turns us to a world view based on signs and symbols instead of measurements and systems. A healthy philosophy of life drawn from a perspective of humble, simple, silent meditation and faith.
As is often the case with this author, his vast learning is presented in digestible, logical morsels. This is truly a Chestertonian work, drawing inspiration from Dr. Kreeft's sense of wonder and gratitude.
The most important theme of the work is the author's use of the Sea as a metaphor for God, man and Heaven. He proposes that we view the cosmos through the action of the Sea and waves. In the spirit of C. S. Lewis, he asks the reader to look not at the Sea, but along the waves and into the deep for understanding; as an icon, not an idol. A symbol of the journey of our inner spirit on the voyage of existence to the ultimate safe harbor, Heaven.
If you wish to purify yourself of the spiritual and intellectual pollution of post-modernism and learn how to think again, this book would not be a bad place to start. Open the book, open your mind, and start your journey.
Well done Dr. Kreeft.