My purpose in using such a rather unfamiliar terminology is that I want to over-come the opposition between ontology and sunyatology from the standpoint of a Biblical theology. In so far as we adhere to the concept of God as Absolute Being in Christian theology, we can not enter into a fruitful dialogical relation to Buddhists because the very denial of such an absolute being lies in the core of Buddhist teachings of pratitya sumutpada and sunyata. If the concept of God as Absolute Being was, as I believe, imposed upon Christianity by the Greek philosophy and essentially alien to the Biblical understanding of God and the world, then it become possible to appreciate the essence of Buddhist teachings from a Christian perspective. Moreover, hayathology, sharing with Buddhism a non-dualistic approach, can bear Christian witness to the significance of practice in the historical world. If we grasp the metaphysical ultimate only as Absolute Being, or only as Absolute Nothingness, then we can not but ignore the historical aspect of deity which is essential to Christianity. We would fall into another kind of dualism, between eternity and temporality, absoluteness and relativity. The adjective "absolute" in Absolute Nothingness would become a misleading one, because there is no such thing as the absolute in all aspects. The ultimate beyond the opposition between being and nothingness should be called Becoming rather than Absolute Nothingness, pace the Kyoto School. The weak points of this school lies in the fact that there was not given a mediating link between the philosophy of Nothingness and the domain of social and ethical practices in history. Many representatives of this school took ambiguous attitudes toward militarism and political totalitarianism in Japan during the second world war, and they did not discuss the responsibility of war crimes Japan had committed in the name of Holy War. One great exception was Tanabe Hajime, who wrote "Philosophy as Metanoetics" after the defeat of Japan.(15)
Though Tanabe's criticism of Nishida's philosophy was not fair in many respects, his own conception of absolute mediation is worth noticing. The relation of an individual to the universal was not conceived by him as unilaterally deterministic, but as reciprocal through the mediating link of species (the local community with its own environmental and historical restrictions) in the ever-going process of the world history. Each of the triad of an individual, the species, and the genus plays a role of mediator between the other two, and does not make a hierarchic order. Especially important is the concept of an individual who takes the role of mediation between his own limited standpoint of species and the truly universal one through "metanoia (repentance) ". As metanoia was an essential element of the message of the historical Jesus, Tanabe's philosophy as metanoetics pointed to a possibility of revising the philosophy of Absolute Nothingness in such a way that Christians as well as Buddhists who take seriously a crisis of the historical world can find an adequate conceptual apparatus in this philosophy.
Returning to the problem of irreversibility, I agree with Takizawa that the divine-human relation is an irreversible one if irreversibility means asymmetry of the relation. To accept the reality of an asymmetrical relation is a necessary condition in order to prevent a fallacy of metaphysical monism where the individual has to be totally swallowed up in the Absolute. So the non-identity of any relation implies its asymmetrical character. On the other hand, I consider Takizawa's thesis of irreversibility as one-sided and inadequate, if irreversibility means the denial of reciprocity between God and man. Takizawa's concept of God in the primordial relation was absolute in the sense that God is absolutely independent of any human decision, though we are unilaterally dependent on God. This conception of God is necessary to .such aspects of religious life as conversion, but not an adequate one if we consider the whole spectrum of the divine-human relation. The God who is absolutely antecedent to our own subjectivity should also be absolutely posterior to it. The consequent divine-human encounter in the historical process is not, as Takizawa insisted, to be considered as a mere reflection of the primordial relation. Far from being a derivative reflection, the consequent divine-human relation should be considered as the actualization of the primordial one. The complementary concept of Becoming God in the world history is also necessary if we are to retrieve the reciprocity of the divine-human relation. The doctrine of universal relativity which some Buddhist scholars, especially Stcherbatsky, identified with that of sunyata(16), is, when applied to the divine-human relation, not acceptable to Christianity until it is reinterpreted and revised on the basis of the Biblical concept of God as Becoming. The personalistic "I-thou" character of the divine-human encounter should be stressed more explicitly than Buddhism because God's self-revelation, as it was recorded in the Bible, occurred simultaneously with a human's self-awakening in their inter-personal en-counter in history. This encounter is more suitably characterized as a sympathetic communion rather than as a mystic union with Godhead.
The prophetic tradition of Judaism seems to preserve the element of mutuality between God and man more explicitly than Christian theology. Martin Buber captured this tradition in these words: "you know always in your heart that you need God more than everything; but do you not know too that God needs you - in the fullness if His eternity needs you.(17)"
The concept of God as Becoming requires the reversal of the Aristotelian thesis concerning the metaphysical status of becoming. Whereas being is the act of becoming in ontology, becoming is the act of being in hayathology. There is no such thing as an independent substance which needs nothing more in order to exist. The very eternity of Godhead requires God's Becoming in history. This is one of fundamental theses of hayathology.
The concept of God-with-us contains an element of mutual transcendence as well as mutual immanence. The dynamism of the divine-human encounter in the Biblical tradition can not be understood enough without the concept of divine exile from humanity.
"The will of God is to be here, manifest and near; but when the doors of this world are slammed on Him, His truth betrayed, His will defied, He withdraws, leaving man to himself. God did not depart of His own volition; He was expelled, " (18) writes Heshel. Such aspects of deity can not suitably be grasped within the traditional conceptual scheme of Christian theology where God as Absolute Being is unilaterally transcendent from the world.
Neither can they be easily understood by traditional categories of Buddhism where the element of transcendence in the historical world was underestimated, and the doctrine of mutual immanence without hindrance was one-sidedly emphasized. The doctrine of dependent co-origination and emptiness is not sufficient to the Biblical understanding of the divine-human relation in so far as it lacks an element of transcendence in the historical world."
Then how should we incorporate a Buddhistic insight into pratitya samutpada and sunyata in the more universal framework of hayathology?
In the recently published book "Beyond Dialogue", John Cobb discussed a possibility that a Christian may accept the concept of sunyata as the ultimate reality, and at the same time worship God as the ultimate actuality." His distinction of actuality from reality is derived from Whitehead's metaphysics where God as an actual entity is a manifestation of the metaphysical ultimate which is called Creativity. Though I appreciate Cobb's thesis of complementarity between Christianity and Buddhism, I do not consider sunyata nor creativity as the ultimate reality. The alternative thesis which I propose here as a heuristic principle is that sunyata and creativity are complementary transcendentals in terms of which we can conceive the God-world relationship. I mean by "transcendentals", as medieval Christian philosophers such as Duns Scotus did, those abstract yet very real concepts which escape classification in the Aristotelian categories by reason of their greater extension and universality of application.(20) As they are predicable both of God and of the world, they can provide a necessary framework to philosophical theology. Whereas the medieval theory of transcendentals discussed mainly "being" and "one" under the overwhelming influence of the Aristotelian ontology, hayathology regards being as being/nothingness, and one as one/many in their inseparability, and creativity and sunyata as complementary transcendentals. Both God and the world are sunyata (empty) as well as creative. Emptiness signifies the infinite openness of the topos of the non-temporal primordial divine-human relation which waits for actualization. Creativity signifies the infinite openness of the process of the consequent divine-human relations in history.