语言现象经验的过程必然地体现为人的“此在”过程。这样的过程不仅提供了语言现象存在的不同形式展示，也提供了不同语言现象形式的统一性基础，即理性存在的统一性基础。作为理性存在的人既是语言现象展示的经验主体，又是颁布了纯粹理性法则的先验主体，其本身的存在就被赋予了一种以自身为目的的纯粹语言意志。语言存在的纯粹理性原因应该归属于先验语言形式的世界，一切基于语言现象经验的过程，都应依据这样的理性原因来重现语言存在的真实。人作为语言存在的先验主体，所规定的是关于纯粹理性世界的先验语言形式。这样的“形式”不仅是纯粹的，而且是“实在”的，它一定要通过实践的理性而体现在语言行为者的“此在”经验中。实践的理性只有通过人的“此在”过程，才能将语言存在的先验王国引领到语言现象的经验中来。%The process of human being’s Dasein is necessarily consisting of revealing various forms of lan-guage phenomenon and its unity based on Reason,which provides not only the distinction between lan-guage and nature,but the premise to make them united.A person,as the subject of language practicing and the subject of transcendental cause,has the pure language willing and pure language principle.It is Reason’s transcendental language cause which leads language being to its transcendental form,and re-builds the real significance of language being in the process of Dasein.What transcendental language cause has provided us are the ontological being of language,i.e.language idea;the language principles or ideas in the kingdom of pure Reason are both transcendental and “actual”,and they necessarily affect language activities of human being because of practical characteristic of Reason,thus the pureness and decidability of Reason’s language principles should be endowed with the characteristic of “objectivity”. All in all,the process of human being’s Dasein is the key to illustrate the “actuality”of Reason’s tran-scendental language cause.
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