We have already spoken of the faith which enables us to believe everything contained in Holy Scripture; and we have shown how true it is and how reasonable. We have also shown, that, as the objects of our faith can proceed from no one but from God, we are bound to believe them unwaveringly. But since, in doctrine as in material things, every movable thing must be reduced to something immovable, we acknowledge, with the fullest reason, that God has established in His Church, over which He exercises peculiar care, certain unchanging doctrines to which all men must submit, doctrines which contain those first principles from which all conclusions are deduced. Therefore, the Catholic Faith most fittingly holds, that all that the Holy Roman Church has defined, or shall define, is most certain truth. It rejects all other teaching. For the Church, as we shall show hereafter, is the firm and solid foundation of the faith, and our guide to salvation.

CHAPTER XI.
THE CHRISTIAN RELIGION MOST PRUDENTLY ESTABLISHES THE TWO PRECEPTS OF CHARITY, AS THE FOUNDATION OF OUR WHOLE MORAL LIFE.

We have already shown, that the Christian religion teaches nothing concerning faith which is either impossible or irrational. We shall now proceed to prove that this is likewise the case in those matters which regard morals. And, although we have already given sufficient proofs of this fact, when we pointed out that the Christian life is the best life possible; nevertheless, as things are better understood in particular than in general, we will descend to some details.

The first principle and foundation of our moral doctrine is the commandment, “Thou shalt love the Lord thy God with thy whole heart, with thy whole soul, with all thy mind, and with all thy strength” (Deut. vi. 5; Matt. xxii. 37; Mark xii. 30; Luke x. 27). And the second commandment is, “Thou shalt love thy neighbour as thyself” (Lev. xix. 18; Matt. xxii. 39; Mark xii. 31; Luke x. 37). We must not understand these commandments as meaning that it is sufficient for salvation to love God and our neighbour from natural virtue or inclination. Our love must proceed from supernatural grace, for the reception of which we must diligently prepare ourselves. Thus, the first principle and foundation of the Christian moral life, is the obligation to love God, by means of supernatural charity, more than ourselves; and to order ourselves and all things else to His glory, as to our end. St. Paul expresses this precept in the following words, “Whether you eat or drink, or whatsoever else you do, do all to the glory of God” (1 Cor. x. 31).

But since the rebelliousness of the flesh withdraws men greatly from the love of God, the precept adds, “thou shalt love the Lord thy God with thy whole heart,” which signifies, thou shalt love Him in such a way that thou shalt subjugate thy sensitive affections to thy will. For by the heart, is here meant, those sensibilities of our nature which are the fount and source of desires which separate us from Divine love. And since the will goes astray, if it be not conformed to reason, the commandment adds the words, “and with thy whole soul,” whereby we understand the will. For, since the soul is in animals the principle of life and motion, whereby we distinguish animate from inanimate beings, so, likewise, does the will move all the powers of the rational soul. Therefore, God commands us to love Him with our whole will; so that all our activities may be directed to Him; our love, desire, joy, fear, and hope, may all be centred on Him; and our whole soul may turn, in horror, from all that is contrary to His will, or derogatory to His honour. The inclination of the will depends entirely on reason; for we cannot desire what we do not know. This is expressed by the words in the commandment, “with thy whole mind,” by which is meant our understanding and our reason. These must be turned to God, who must, either habitually or actually, be the chief object of our contemplation. But we are bound to honour God, not only with our souls, but with our bodies, working our external works to His glory. Therefore, the commandment concludes with the words, “all thy strength”. Observe the word all, remembering that an end, being loved for itself, is not loved according to measure; but the means, being ordained to an end, are loved in proportion to the end to which they are ordered. Since, then, God is our End, we are commanded to love Him with our whole heart, with our whole soul, with all our mind, and all our strength. That is to say, that, both interiorly and exteriorly, we must be wholly directed to God, and lead perfect lives; so that in us God may be glorified, as the Cause is honoured by the perfection of its effect. This commandment teaches us, further, in what manner man is bound to love himself. For self-love must be directed to God, who must be glorified in man, as in His own work.

But, as the love of others is not so natural to man as is self-love, we are taught how we must love our neighbour by the words, “thou shalt love thy neighbour as thyself”. That is, thy love of others shall be governed by the same motive as that which directs thy love of thyself; and thou must desire for thy neighbour that same perfection of life, and the other blessings, which thou dost desire for thyself; so that in him, God may be honoured and glorified, as in His most perfect work. Nothing, surely, can be conceived more reasonable, than these two commandments, on which depend all other laws, both human and Divine. Therefore all that is included in them, or results from them, is by Christians esteemed holy and inviolable; and whatever impugns them, is reputed impious and diabolical.

CHAPTER XII.
THE EXCELLENCE OF THE MORAL TEACHING OF THE CHURCH.

We have already shown how reasonably Holy Scripture sets before us two tables of commandments: one teaching us our duty to God, and the other showing what we owe to our neighbour. For, as each man forms part of a community, he must be rightly disposed, both towards the head of the community, and to his fellow-members; that is to say, towards God, and towards his neighbours. Man is rightly disposed towards God, when He loves Him with his whole heart, his whole soul, with all his mind, and with all his strength. But as we owe to our civil rulers three duties, viz., loyalty, reverence, and obedient service, the Christian religion sums up these our obligations to God in three commandments. The first commandment bids us to honour the one only true God, and none other; the second, to reverence His Holy Name; the third, to pay Him obedient service, by honouring His day, by both interior and exterior acts of worship. From these three commandments spring all the other precepts which relate to man’s service of God; and by disobedience to them, he forfeits his eternal salvation.

The second table of the Law concerns man’s duty to his neighbour. This consists in doing him good, and avoiding injury to him. The first commandment of this table is, “Honour thy father and thy mother”. And the honour which we are hereby bidden to render to our parents means, not merely that we must reverence them in our words, but, likewise, that we must help them by good works. The next three commandments forbid us to injure any one. We can do harm to others in three ways, namely by injury to them in their own person; by injuring them in the person of those connected with them; and by injuring their property. Hence, the first of these commandments forbids homicide; the second prohibits adultery; and the third theft. And, as we are commanded to abstain from injury to others, not only in deed, but also in word or desire, the next commandment forbids false testimony; and the two following warn us against coveting either the wife, or the property of another.