Chih-i illustrates the five meanings of sūtra (in the view concerning the word sūtra as translatable) with reference to the mind contemplation. …

In terms of the mind as warp and weft that is related to words, Chih-i views the realization as warp, and contemplation weft. This weaves and forms words and speeches. In terms of mind as warp that is related to practice, Chih-i states that the mind that contains the practice of wisdom is taken as warp, and the mind that contains the practice of eliminating defilement as weft. This weaves and forms all practices. In terms of mind as warp that is related to principle, Chih-i holds that the mind, which is vertically in accordance with the principle, is taken as warp, and the mind, which is horizontally in accordance with the principle, as weft. This weaves and forms the doctrine as principle. (Vol. 2, Page 398)