exist without firmness and straightness of tongue ... [1]

«لا يَسْتَقِيمُ ايمانُ عَبْدٍ حَتّى‌ يَسْتَقِيمَ قَلْبُهُ، وَ لا يَسْتَقِيمُ قَلْبُهُ حَتّى‌ يَسْتَقِيمَ لِسانُهُ» ..

Thirty great sins ,which originate from tongue

The importance of correction of tongue is made clearer whenwe know that a large part of sins as a large part of good deeds are performed by tongue.

Ghazali has narrated twenty types of vices and sins fortongue as follows:

1- Speaking about the affairs not concerned with man. 2- Rant and babbling 3- Speaking about forbidden affairs like description ofmeetings of wine, gambling and unchaste women.

4- Dispute and fussing( caviling and objecting others forwrong purposes as humiliating them or one's own pedantry ).

5- Enmity and affray and quarrel in utterance 6- Affectation in speech and trouble in rhythm and such like 7- Abuse and insult 8- Cursing 9- Profane singing and unsound sings 01- Indulgence in humor 11- Irony and mockery 21- Disclosing mysteries of others 31- Lie promise 41- Lie in speech and oath 51- Slander 61- Gossip 71- Hypocrisy in speech

[1]

Majlessi, BeharolAnvar, 262/ 57, andM ohajjatolB eisae, 391/ 5