This work doesn't try to "hide any reference to our self nature", it tries to reveal that self is a delusion. As Master Hanshan says: "the bodhisattva should contemplate the nonexistence of a self," (from his commentary on the Diamond Sutra [Jin-gang Jing Jywe-yi]) so any attempt to ascribe to Hanshan the very non-Buddhist notion of any "self nature" would be (at best) a misrepresentation. Certainly this work does represent Thich Nhat Hanh's own interpretation of the tradition, but his "philosophy" is representative of mainstream Buddhism (to the extent anything ever is).

how do you put into words the indescribable? I appreciated this treatment of a very complicated concept (excuse me, of something that is beyond conceptualization). 'A' is 'A'. 'A' is not 'A'. 'A' is 'A', but this statement is not the same as the first... I really do not want to attempt to explain non-dualism here when Thich Nhat Hanh does so much better.
If this intrigues you, and you would like to investigate it from a different angle, I suggest looking into physics: non-locality (as demonstrated by the EPR paradox), holographic models of the universe, and the likelihood that a deeper level of reality contains more than the four dimensions in which we are embedded, offer possibilities as to how this sutra relates to us.