Conforming to the decree of Pope Urban VIII, the author declares that all he has written in this biography is based only on the certitude of human testimony. Since the Church has not declared herself, the author makes no claim to supernatural manifestations. The nihil obstat and imprimatur are official declarations that a book or pamphlet is free from doctrinal or moral error. No implication is contained therein that those who have granted the nihil obstat and imprimatur agree with the contents, opinions, or statements expressed.