402 The Faith of Our Fathers and the Arian heresy, 53, et seq.; and the Irish people, 54; and state, 57; her relation to other religious bodies, 58; does not need temporal power for preservation, 58; and modern progress, 59; benefited by scientific appliances and inventions, 59; fosters intellectual progress, 60; encourages scientific investigation, 60; science indebted to her — has no fear from human liberty, 61; outlasts all other governments, 61, et seq.; authority comes from God, 65; her teaching directed by the Holy Ghost, 65; her infallibility proved from Scripture, 66, et seq.; Christ's promise in favor of the, 70, 73; her doctrines incapable of reform, 73; her doctrinal decrees irrevocable, 76; divinely appointed teacher of revelation, 76, 77; guardian and depository of the Bible, 90; requires a head, 97; unity maintained by supreme head, 77; only one founded by Christ, 100; built on Peter, 100; revealed Word of God her Magna Charta, 124; exhorts all to honor Mary, 187; her practice proves existence of purgatory, 214, et seq.; Fathers of the — unanimous in praying for the dead, 217; has always promoted civil liberty, 226; defends civil rights and liberties, 23 1 ; conflict with state, 23 1 ; and American Independence, 240; desires no governmental aid, 246; does not sanction persecution or bloodshed, 249; disavows the excesses of the Spanish Inquisition, 258;