It is not the ambassador, it is not the messenger, but the Lord Himself that saveth His people. The Lord remaineth alone, for no man can be partner with God in forgiving sins; this office belongs solely to Christ, who taketh away the sins of the world.
AmbroseThe Lord Jesus himself proclaims, 'This is My Body.' Before the blessing of the heavenly words something of another character is spoken of; after consecration it is designated 'body'. He himself speaks of his blood. Before the consecration it is spoken of as something else; after the consecration it is spoken of as 'blood'. And you say, 'Amen', that is, 'It is true.' What the mouth speaks, let the mind within confess; what the tongue utters, let the heart feel.
Ambrose