In all his science (including chemistry) he saw mathematics and numbers as central.
Nevertheless, his prestige forged a permanent link between science and government.
Newton's masterpiece was in theoretical physics, (1704) was written in English with experimental queries...
The young Newton did not aspire to ecclesiastical orders requisite for the mastership of a college.
His theological interests, however, were not an aberration of old age.
All his life he was a conforming member of the Anglican Church, although he had reservations about its Trinitarian doctrine.
Although he appreciated its universalist humanitarianism, he was by no means a deist inasmuch as he believed in a personal God, omniscient and omnipotent, but, above all, immanent not only had He created the universe, but He keeps it under constant surveillance and intervenes in a providential way from time to time (e.g., paths of comets).
Neither was Newton a Unitarian; he believed in Jesus Christ as the Messiah, the Son of God-not a mere man, but a sort of viceroy for the Father (his precise concept is somewhat problematic).
Isaac Newton: "Affiliation: Anglican, Heterodox; Newton was born into the Anglican church and publicly conformed to it." At about age 30 he came to believe "that Trinitarianism was a fraud and that Arianism was the true form of primitive Christianity.
Newton held these views, very privately, until the end of his life.