Fishing is just the reason. It is the hard coating of the shell, inside which the pearl is hidden. The hunter's relationship with nature, the sea, and the game, is a symbolic point of reference for understanding the nature of the mind.
On the subject of fishing, then, and as the reader reads the author's experiential stories, he will adapt the basic principles of good living to his own measures and standards, to tune in to the eternal secrets that will lead him on the path of spontaneous perfection of of life. He will discover the precious pearls of Zen, which as beacons of life tune us to our authentic being.
It is easier to say what Zen is NOT than to define it precisely. In this, after all, lies its charm. The deepest essence of Zen cannot be expressed through words, nor can it be subsumed into a dogma. It requires experimentation and practice, much like fishing. Zen, above all, is an experience, a process for the liberation of man.
The book includes self-awareness exercises and meditations.