We, however, remaining faithful to our task in this treatise, find ourselves compelled to give our explanation. According to our opinion “under his feet” (raglav) denotes “under that of which He is the cause,” “that which exists through Him,” as we have already stated. They (the nobles of the children of Israel) therefore comprehended the real nature of the materia prima, which emanated from Him, and of whose existence He is the only cause. Consider well the phrase, “like the action of the whiteness of the sapphire stone.” If the colour were the point of comparison, the words, “as the whiteness of the sapphire stone” would have sufficed; but the addition of “like the action” was necessary, because matter, as such, is, as you are well aware, always receptive and passive, active only by some accident. On the other hand, form, as such, is always active, and only passive by some accident, as is explained in works on Physics. This explains the addition of “like the action” in reference to the materia prima. The expression “the whiteness of the sapphire” refers to the transparency, not to the white colour; for “the whiteness” of the sapphire is not a white colour, but the property of being transparent. Things, however, which are transparent, have no colour of their own, as is proved in works on Physics; for if they had a colour they would not permit all the colours to pass through them nor would they receive colours; it is only when the transparent object is totally colourless, that it is able to receive successively all the colours. In this respect it (the whiteness of the sapphire) is like the materia prima, which as such is entirely formless, and thus receives all the forms one after the other. What they (the nobles of the children of Israel) perceived was therefore the materia prima, whose relation to God is distinctly mentioned, because it is the source of those of his creatures which are subject to genesis and destruction, and has been created by him. This subject also will be treated later on more fully. Observe that you must have recourse to an explanation of this kind, even when adopting the rendering of Onkelos, “And under the throne of His glory”; for in fact the materia prima is also under the heavens, which are called “throne of God,” as we have remarked above. I should not have thought of this unusual interpretation, or hit on this argument were it not for an utterance of R. Eliezer ben Hyrcanus, which will be discussed in one of the parts of this treatise (II. chap. xxvi.). The primary object of every intelligent person must be to deny the corporeality of God, and to believe that all those perceptions (described in the above passage) were of a spiritual not of a material character. Note this and consider it well. CHAPTER XXIX