The likeness of man above the throne is divided, the upper part being the colour of chashmal, the lower part like the appearance of fire. As regards the word chashmal, it has been explained to be the compound of two words chas and mal, including two different notions, viz., chash signifying "swiftness," and mal denoting "pause." The two different notions are here joined in one word in order to indicate figuratively the two different parts,—the upper part and the lower. We have already given a second explanation, namely, that chashmal includes the two notions of speach and silence; in accordance with the saying of our Sages, "At times they are silent, at times they speak."
Ch.7 - Guide for the Perplexed (c. 1190) - Part III