any doctrine of faith or morals.

Q. 547. {127} In whom are these attributes found in their fullness?
A. These attributes are found in their fullness in the Pope, the visible
Head of the Church, whose infallible authority to teach bishops,
priests, and people in matters of faith or morals will last to the end
of the world.

Q. 548. {128} Has the Church any marks by which it may be known?
A. The Church has four marks by which it may be known: it is One; it is
Holy; it is Catholic; it is Apostolic.

Q. 549. {129} How is the Church One?
A. The Church is One because all its members agree in one faith, are all
in one communion, and are all under one head.

Q. 550. How is it evident that the Church is one in government?
A. It is evident that the Church is one in government, for the faithful
in a parish are subject to their pastors, the pastors are subject to the
bishops of their dioceses, and the bishops of the world are subject to
the Pope.

Q. 551. What is meant by the Hierarchy of the Church?
A. By the Hierarchy of the Church is meant the sacred body of clerical
rules who govern the Church.

Q. 552. How is it evident that the Church is one in worship?
A. It is evident that the Church is one in worship because all its
members make use of the same sacrifice and receive the same Sacraments.

Q. 553. How is it evident that the Church is one in faith?
A. It is evident the Church is one in faith because all Catholics
throughout the world believe each and every article of faith proposed by
the Church.

Q. 554. Could a person who denies only one article of our faith be a
Catholic?
A. A person who denies even one article of our faith could not be a
Catholic; for truth is one and we must accept it whole and entire or not
at all.

Q. 555. Are there any pious beliefs and practices in the Church that are
not articles of faith?
A. There are many pious beliefs and practices in the Church that are not
articles of faith; that is, we are not bound under pain of sin to
believe in them; yet we will often find them useful aids to holiness,
and hence they are recommended by our pastors.

Q. 556. Of what sin are persons guilty who put firm belief in religious
or other practices that are either forbidden or useless?
A. Persons who put a firm belief in religious or other practices that
are forbidden or useless are guilty of the sin of superstition.

Q. 557. Where does the Church find the revealed truths it is bound to
teach?
A.