28 This is the more true because the rights of the family and of the State, even the rights of individuals regarding a just liberty in the pursuit of science, of methods of science and all sorts of profane culture, not only are not opposed to this pre-eminence of the Church, but are in complete harmony with it. The fundamental reason for this harmony is that the supernatural order, to which the Church owes her rights, not only does not in the least destroy the natural order, to which pertain the other rights mentioned, but elevates the natural and perfects it, each affording mutual aid to the other, and completing it in a manner proportioned to its respective nature and dignity. The reason is because both come from God, who cannot contradict Himself: "The works of God are perfect and all His ways are judgments."
Source: Divini Illius Magistri (Vatican.va)