According to Islamic traditions, the learned men who deliberately withhold their useful knowledge from those who deserve to know and use it, are sternly condemned. The prophet has said: ``If a scholar is asked a question, and he denies to answer, in the Resurrection Day a bridle of fire will be attached to his mouth.'' HAZRAT ALI (AS) was also asked that: ``Among the creatures of Allah; who is worse than SATAN and PHARAOH?'' He answered: ``Corrupt and vicious scholars who display false, and conceal the facts are worse. They are the ones that on them is the curse of Allah, and that of the cursers.''