This book is called 'Guidance of the Heart' for two reasons. The first reason is to convey the message of monotheism which is also the message of all the prophets.
The second reason, perhaps less obvious, is that a case can be made, based on current, responsible Gospel scholarship, that Jesus was calling his people to the Salvation that lies beyond the worship of the merely created, the Salvation that relies instead on the direct worship of the Creator.I believe emphatically that the authentic words of Jesus invite us to move beyond what is conventionally understood as Christianity for this Salvation.