23كَلّا لَمّا يَقضِ ما أَمَرَهُMuhammad AsadNay, but [man] has never yet fulfilled what He has enjoined upon him!1In other words, man has failed to make adequate use of the intellectual and spiritual endowment referred to in verse 20. Whereas some commentators are of the opinion that this relates only to the type of man spoken of in verse 17 above, others maintain, with greater plausibility, that it is a reference to man in general - thus: "No human being has ever fulfilled all that was imposed on him as a [moral] duty" (Mujahid, as quoted by Tabari, with a similar statement attributed by Baghawi to Al-Hasan al-Basri); or "From the time of Adam to this time, no human being has ever been free of shortcomings" (Zamakhshari, Baydawi). This is in tune with the Qur'anic doctrine that perfection is an attribute of God alone.