Is there then no restriction to be imposed on sin? The answer is: sin can never make one happy. Even were there pleasure in it for the time being, it would re-echo, and the re-echo of a false note is never pleasing to the musical ear. If a person were really happy in his "sin", one might be satisfied that it was really his virtue, and that it is only to us, from our point of view, that his action is sinful. Therefore the Sufi attends to his own journey, and does not judge others.