Surah 34. Saba, Ayah 48

Cf. 21:18 .

Allah's Truth is so vast that no man in this life can compass the whole of it. But Allah in His mercy selects His servants on whom it is cast like a mantle. They see enough to be able to teach their fellow men. It is through that mantle-that mission received from Allah-that a messenger can speak with authority to men, and this is his third argument.