宗教神聖向度之絕對超越性與其俗世世界向度之相對內在性間斷裂又互動的張力關係，尤呈現於神聖絕離俗世的密諦性與神聖向世界呼召的開放性間辯證張力。本文以基督宗教典範及其於日耳曼文化中所生德意志神哲學範例，顯示其密諦性與開放性之辯證。先就基督宗教之義理、聖典及社群三位一體的體系性綱舉其體系神學所蘊含的密諦與開放之辯證，接著以艾克哈特作為其日耳曼神哲學及德意志密契神思之緣起，初探其中所呈現密諦與開放之辯證，以揭示由此源生的日耳曼精神運動之德意志神哲學底主要線索。

Between the dimension of absolute transcendence of religious holiness and that of relative immanence of earthly worldliness, there is some tension of fracture and interaction. This is especially true of the dialectical tension between the mystics of holy transcending above earthliness and the openness of the holy calling to the world. A system of religion itself is actually the medium and mediation in - between holiness and earthliness, absoluteness and relativity, Infinity and finitude, spirituality and materiality, eternity and contemporariness and so on. And the mystics, which incarnate the most profound religious experience, present also the peak of mutual opening between divinity and humanity. This essay will take Christianity as paradigm and its origin of its German theology and philosophy in the German culture as an example, to illustrate the dialectical relationship between the mystics and openness. This essay will outline the implicated dialectics between mystics and openness in the systemic theology of Christianity, which is itself a triune systemics of theological dogma, sacred text and community of belief. Hereafter it will explore preliminarily this dialectics in Meister Eckhart’s mystic thinking as the genesis of German Christian theology and philosophy, in particular of German Mysticism. Finally it will reveal the main clue of the development of German theology and philosophy in the German movement of spirit (Geist).