We are not to make unlawful that which Allah (SWT) has made lawful. Instructions are given to believers regarding food and oaths. Intoxicants, games of chance, idols, drawing lots are forbidden. Some of the reasons for prohibiting intoxicants and games of chance are that the devil tries to cause enemity between human beings through these items, (for instance everyone tries to take away the money of others), turns them away from the remembrance of Allah (SWT) and Salat. The social evils associated with alcohol are well known. Brain damage is as common as cirrhosis of the lever in drunkards. There is no sin on believers in what they ate in ignorance when they later on restrained from evil and did righteous works.