The process which the Kabbalists described as the emanation of divine energy and divine light was also characterized as the unfolding of the divine language. This gives rise to a deep-seated parallelism between the two most important kinds of symbolism used by the Kabbalists to communicate their ideas. They speak of attributes and of spheres of light; but in the same context they speak also of divine names and the letters of which they are composed. From the very beginnings of Kabbalistic doctrine these two manners of speaking appear side by side.