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 means to salvation; explicit belief in others is only of precept, and the want of it, if inculpable, will not be a bar to salvation. Explicit belief in the existence of God, the rewarder of them that seek him, is necessary for salvation, and probably also belief in the mysteries of the Blessed Trinity and the Incarnation. Explicit belief in these mysteries is certainly of precept. A Christian is bound also to know and believe the substance of what is contained in the Creed, the sacraments which are of obligation, the precepts of God and of the Church, and the Lord's Prayer. It is sufficient to have implicit faith in other truths of revelation.

4. It is not sufficient to have believed the necessary articles of the faith once in a lifetime. Our acts of faith must be frequently renewed; we must lead lives of faith, according to the divine precept. This divine precept is sometimes of obligation per se, as when the truths of revelation first become known to a man and he becomes conscious of his obligation; sometimes it is of obligation per accident, as after a sin against the faith has been committed, or when a duty has to be fulfilled which requires an act of faith. However, for such as have once made their act of faith, it will be sufficient in order to fulfil the divine precept if the act of faith is renewed implicitly, as is done whenever we pray, assist at Mass, or receive any of the sacraments. It is well, however, especially in these days of unbelief, to renew frequently explicit acts of faith according to the wish and practice of the Church. They are acts of very great merit with God.