Xenophanes does not seem to have been ever molested on account of his religious opinions. He complains bitterly enough that people preferred fiction to philosophy, that uneducated athletes engrossed far too much popular admiration, that he, Xenophanes, was not sufficiently appreciated;[B] but of theological intolerance, so far as our information goes, he says not one single word. It will easily be conceived that the rapid progress of Greek speculation was singularly favoured by such unbounded freedom of thought and speech. The views just set forth have often been regarded as a step towards spiritualistic monotheism, and so, considered in the light of subsequent developments, they unquestionably were. Still, looking at the matter from another aspect, we may say that Xenophanes, when he shattered the idols of popular religion, was returning to the past rather than anticipating the future; feeling his way back to the deeper, more primordial faith of the old Aryan race, or even of that still older stock whence Aryan and Turanian alike diverged. He turns from the brilliant, passionate, fickle Dyaus, to Zên, or Ten, the ever-present, all-seeing, all-embracing, immovable vault of heaven. Aristotle, with a sympathetic insight unfortunately too rare in his criticisms on earlier systems, observes that Xenophanes did not make it clear whether the absolute unity he taught was material or ideal, but simply looked up at the whole heaven and declared that the One was God.[15] Aristotle was himself the real creator of philosophic monotheism, just because the idea of living, self-conscious personality had a greater value, a profounder meaning for him than for any other thinker of antiquity, one may almost say than for any other thinker whatever. It is, therefore, a noteworthy circumstance that, while warmly acknowledging the anticipations of Anaxagoras, he nowhere speaks of Xenophanes as a predecessor in the same line of enquiry. The latter might be called a pantheist were it not that pantheism belongs to a much later stage of speculation, one, in fact, not reached by the Greek mind at any period of its development. His leading conception was obscured by a confusion of mythological with purely physical ideas, and could only bear full fruit when the religious element had been entirely eliminated from its composition. This elimination was accomplished by a far greater thinker, one who combined poetic inspiration with philosophic depth; who was penetrating enough to discern the logical consequences involved in a fundamental principle of thought, and bold enough to push them to their legitimate conclusions without caring for the shock to sense and common opinion that his merciless dialectic might inflict.