Was it natural? Rome's three senses of natural: from birth, agreeable to nature, flowing from nature's principles
The question is whether this righteousness and holiness was natural to the first man or not. To answer it, the teachers of the Roman Church point out that "natural" is used in several ways.
First, whatever one has from birth is called natural, and in this sense natural is opposed to acquired. Second, what suits nature, what does not destroy nature but rather adorns and perfects it, is called natural; in this sense natural is opposed to what is against nature.
Third, what is either a part of nature, or flows from nature's principles, or is fitted to flow from them, is called natural. In this sense the body and the soul, the powers of sense and of understanding, and the acts those powers perform without help that goes beyond nature, are called natural, and so natural is opposed to supernatural.
Latin
III. Quaeritur autem an ista justitia & sanctitas primo homini fuerit naturalis, necne? Ad quam quaestionem ut respondeant Doctores Ecclesiae Romanae, observant naturale variis modis sumi. Primo enim naturale dicitur omne quod habetur a nativitate: & ita naturale opponitur adventitio. Secundo naturale vocatur illud quod est naturae consentaneum, quodque naturam non destruit, sed potius ornat & perficit. Quo sensu naturale opponitur ei quod est contra naturam. Tertio naturale vocatur quod aut est pars naturae, aut fluit ex principiis naturae, vel ab illis fluere aptum est. Qua significatione corpus & animus, facultates quoque tum sentiendi, tum intelligendi, & operationes quae ab eis facultatibus, absque auxilio naturam superante exercentur, naturalia dicuntur: & ita naturale opponitur supernaturali.