It seems reasonable to suggest that Isaac Newton was a man who believed firmly in the scientific approach when researching his mathematical solutions. Basing everything on fact rather than inconclusive speculative theories that record commonalities provided by the translation of planetary movements does not seem to be the kind of arena likely to interest such an eminent scientist. Yet Isaac Newton possessed interest in alchemy, mysticism and theology that would have damaged his credibility had it become public knowledge during his lifetime. Indeed he may not have received his knighthood to become Sir Isaac Newton had his beliefs about God and the Universe become common knowledge.
Not that Isaac Newton did not believe in God, he did, and appears to have been a deeply devout Christian however his interest in religious mysticism categorized him as a Unitarian, that is one who believes that God is alone in being an omnipotent spirit. Jesus and the Holy Spirit were never included as part of the composition of the religious belief followed by Newton. This powerful challenge to established fact within the religious fraternity would have been unacceptable to the English society of the period. Newton was all too aware that his beliefs challenged accepted knowledge and ensured that his beliefs remained firmly hidden.
Isaac Newton theorised about the universe with considered theories that his mathematical findings acted as a tribute to God, the creator. Unfortunately mathematical theories of Sir Isaac Newton also suggested that the universe itself was comprised of matter given to responses that were predictable through mathematical laws. Although this sounds similar to astrology where Newton's theories and Astrology differ relates to astrology recognizing that the universe possesses a life of its own. Newton saw the universe through mathematical calculations but lacking the living persona that exists in God or the universe and spirit world. Isaac Newton initially depicted God as the creator but lacking depth, mathematics is not something that is given to the provision of a personality. Neither did it reflect that Nature is a living entity that is a part of the universe whole. Yet moving away from Isaac Newton's calculations and studying more deeply his interests in the mystical aspects of religion suggest that he too recognized the limitations of mathematics, although actually admitting such a thing would not have sustained his credibility.