The First Vatican Council teaches, then, that the truth attained by philosophy and the truth of Revelation are neither identical nor mutually exclusive: “There exists a twofold order of knowledge, distinct not only as regards their source, but also as regards their object. With regard to the source, because we know in one by natural reason, in the other by divine faith. With regard to the object, because besides those things which natural reason can attain, there are proposed for our belief mysteries