Mies makes no mention of Golden Section. But our previous studies on his drawings derived some possibility that he made use of Golden Section in his principal works. In this paper to confirm it the sense of proportion in Mies's discourses, contributions for magazines, manuscripts for lectures, records of interviews, were investigated. As the result it was found that Mies's sense of proportion was not only proportion derived by a feeling for the expression of proportion, but also one determined by normative, conservative, eternal laws, such as specific geometrical relationship, namely, Golden Section.