The laws of nature oblige only in the court of conscience.
27. But because most men, by reason of their perverse desire of present profit, are very unapt to observe these laws, although acknowledged by them; if perhaps some, more humble than the rest, should exercise that equity and usefulness which reason dictates, the others not practising the same, surely they would not follow reason in so doing: nor would they hereby procure themselves peace, but a more certain quick destruction, and the keepers of the law become a mere prey to the breakers of it. It is not therefore to be imagined, that by nature, that is, by reason, men are obliged to the exercise of all these laws[[7]] in that state of men wherein they are not practised by others. We are obliged yet, in the interim, to a readiness of mind to observe them, whensoever their observation shall seem to conduce to the end for which they were ordained. We must therefore conclude, that the law of nature doth always and everywhere oblige in the internal court, or that of conscience; but not always in the external court, but then only when it may be done with safety.
The laws of nature are sometimes broken by an act agreeable to those laws.
28. But the laws which oblige conscience, may be broken by an act not only contrary to them, but also agreeable with them; if so be that he who does it, be of another opinion. For though the act itself be answerable to the laws, yet his conscience is against them.
The laws of nature are immutable and eternal.
29. The laws of nature are immutable and eternal: what they forbid, can never be lawful; what they command, can never be unlawful. For pride, ingratitude, breach of contracts (or injury), inhumanity, contumely, will never be lawful, nor the contrary virtues to these ever unlawful, as we take them for dispositions of the mind, that is, as they are considered in the court of conscience, where only they oblige and are laws. Yet actions may be so diversified by circumstances and the civil law, that what is done with equity at one time, is guilty of iniquity at another; and what suits with reason at one time, is contrary to it another. Yet reason is still the same, and changeth not her end, which is peace and defence, nor the means to attain them, to wit, those virtues of the mind which we have declared above, and which cannot be abrogated by any custom or law whatsoever.
He who endeavours to fulfil the laws of nature, is just.
30. It is evident by what hath hitherto been said, how easily the laws of nature are to be observed, because they require the endeavour only, (but that must be true and constant); which whoso shall perform, we may rightly call him just. For he who tends to this with his whole might, namely, that his actions be squared according to the precepts of nature, he shows clearly that he hath a mind to fulfil all those laws; which is all we are obliged to by rational nature. Now he that hath done all he is obliged to, is a just man.
The natural law is the same with the moral.
31. All writers do agree, that the natural law is the same with the moral. Let us see wherefore this is true. We must know, therefore, that good and evil are names given to things to signify the inclination or aversion of them, by whom they were given. But the inclinations of men are diverse, according to their diverse constitutions, customs, opinions; as we may see in those things we apprehend by sense, as by tasting, touching, smelling; but much more in those which pertain to the common actions of life, where what this man commends, that is to say, calls good, the other undervalues, as being evil. Nay, very often the same man at diverse times praises and dispraises the same thing. Whilst thus they do, necessary it is there should be discord and strife. They are, therefore, so long in the state of war, as by reason of the diversity of the present appetite, they mete good and evil by diverse measures. All men easily acknowledge this state, as long as they are in it, to be evil, and by consequence that peace is good. They therefore who could not agree concerning a present, do agree concerning a future good; which indeed is a work of reason; for things present are obvious to the sense, things to come to our reason only. Reason declaring peace to be good, it follows by the same reason, that all the necessary means to peace be good also; and therefore that modesty, equity, trust, humanity, mercy, (which we have demonstrated to be necessary to peace), are good manners or habits, that is, virtues. The law therefore, in the means to peace, commands also good manners, or the practice of virtue; and therefore it is called moral.