Whether confession is according to the natural law?

Objections

Objection 1 : It would seem that confession is according to the natural law. For Adam and Cain were bound to none but the precepts of the natural law, and yet they are reproached for not confessing their sin. Therefore confession of sin is according to the natural law.
Objection 2 : Further, those precepts which are common to the Old and New Law are according to the natural law. But confession was prescribed in the Old Law, as may be gathered from Is. 43:26: "Tell, if thou hast anything to justify thyself." Therefore it is according to the natural law.
Objection 3 : Further, Job was subject only to the natural law. But he confessed his sins, as appears from his words (Job 31:33) "If, as a man, I have hid my sin." Therefore confession is according to the natural law.