According to Jose Rizal's former mentor Rev. Pablo Pastells, S.J., who reprinted in 1900 the early work of his fellow Jesuit, Fr. Pedro Chirino, Labor Evangelica, which was first published in 1663 from an anonymous document dated April 20, 1572, the name of Bathala can be ascertained "by resolving the word into its primary elements, Bat and Ala = 'Son God, or Son of God.'" This is why the first missionaries did not deprive the natives of this name when they instructed them about the existence of God and the mysteries of the Trinity, the incarnation, and redemption, as states an anonymous but very circumstantial relation written in Manila, on April 20, 1572.[7][8]