Article I. On Matrimonial Consent and Its Qualities

"Matrimony is effected by the consent of the parties, legitimately manifested between persons capable according to law; this consent cannot be supplied by any human power."

Thus the Code of Canon Law, can. 1081, § 1. As is evident from what was said above, n. 654, consent is at once the matter, form, and efficient cause of the sacrament of matrimony, although under a diverse respect.