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 and by all people, that is really and truly Catholic' (Vincent of Lerins; d. 450).

64. If the Catholic Church is to lead all men to eternal salvation, and has, for that purpose, received from Christ her doctrine, her means of grace, and her powers, what, for his part, is every one obliged to do?

Every one is obliged, under pain of eternal damnation, to become a member of the Catholic Church, to believe her doctrine, to use her means of grace, and to submit to her authority.

65. Who teaches us this obligation?

Jesus Christ Himself, in these words (Matt, xviii. 17): 'If he will not hear the Church, let him be to thee as the heathen and publican '; and (Mark xvi. 16): 'He that believeth not [the Apostles and their lawful Successors] shall be condemned.'

66. Who is a member of the Catholic Church?

Every one who is baptized, and has neither voluntarily separated himself, nor has been excluded, from her.

67. Who have voluntarily separated themselves from the Church?

1. All those who by their own fault are Heretics, i.e., who profess a doctrine that has been condemned by the