In reality the message has been from one source and that is God. Whatever name the wise person gave that message it was not their message, it was the message of God. Those whose hearts had eyes to see and ears to hear have known and seen the same messenger, because they have received the message. And those whose hearts have no eyes or ears have taken the messenger as important and not the message. At whatever period that message came and in whatever form the message was garbed, it was only that one message, the message of wisdom.