Many different peoples and beliefs exist in the world. They are formed by various natural settings， cultural styles， and historical backgrounds. Every culture is a constituting part to the wonderful world. If people could love and help each other， it would make human world a paradise.
Dharma Mater Hsin Tao once said: 「When the mind is at peace， the whole world is at peace.」 Hopefully， these words will give readers encouragement and peace will pervade the entire world.
In this book the concept of “mountain, sea, sky, man” is used to express the “four realms of reality” of the Huayan school of Buddhism. Mountain corresponds to the realm of individual phenomena; sea corresponds to the realm of nonobstruction
between principle and phenomena; sky corresponds to the realm of the one principle (śūnyatā) ; and man corresponds to the realm of nonobstruction between phenomena, The same correspondence is expressed in the following verse:
Mountain:
From the sacred mountain of Huayan, entering the realm of reality; conventional truth is spoken in the realm of individual phenomena.
Sea:
Returning to the essence through the sea of Vairocana; Buddha is the realm of nonobstruction between principle and phenomena.
Sky:
The universal Dharmakaya is ineffable; in the realm of the one principle the essential nature is emptiness itself.
Man:
The vows of Samantabhadra span the three times; the realm of nonobstruction between phenomena—this is the Bodhisattva practice.
