911. [verse 18] 'And the construction of the wall was of jasper' signifies that every Divine Truth of the Word in the sense of the letter with the men of that Church is transparent by virtue of the Divine Truth in the spiritual sense. By 'the wall' is signified the Word in the sense of the letter (n. 898). By 'the construction' is signified everything of it, because everything of it is in the construction. By 'jasper' is signified much the same as by 'a precious stone' on the whole, and by 'a precious stone' when said of the Word is signified the Divine Truth of the Word in the sense of the letter transparent by virtue of the Divine Truth in the spiritual sense (n. 231, 540, 726, 823). That much the same is signified by 'jasper' may be seen above (n. 897). The reason why it is transparent is because Divine Truth in the sense of the letter is in natural light and Divine Truth in the spiritual sense is in spiritual light, and therefore when spiritual light inflows into the natural light with a man who is reading the Word, he is enlightened and sees the truths there, for the objects of spiritual light are truths. Indeed the Word in the sense of the letter is such that the more a man is enlightened by means of an influx of the light of heaven the more he sees truths by virtue of their connection and resultant form, and the more he so sees them the more interiorly is his rational opened, for the rational is the very receptacle of the light of heaven.