Therefore...

Therefore, straightness and righteousness do not occur except through their professing the Omniscient, the All-aware, Who knows the secret and what is yet more hidden, enjoins righteousness and forbids corruption, from Whom no secret remains hidden, that through that they may prevent themselves from all kinds of corruption when they are alone with them.

[1] Surely the firmest deed for uprooting crime, driving it away from individual and society, purifying the earth from sins and offenses is planting the faith in Allah, the Exalted, in the depths of souls and hearts, and the faith in that Allah watches him who commits crime or sin with respect to his own soul and his society, and that He will severely punish him because of it. [1] Ibid., p. 100.

As man loves his own soul and seeks good for it, he normally refrains from any sin which leads to destruction and misery. Crimes have increased during these time; terrorist deeds such as killing the innocent, hijacking, and the like from among crimes and offenses have also increased because of the weakness of the faith in Allah and the paucity of the religious restraint in souls. Surely the forces of good and peace are built on faith in Allah, the Most High.

The faith in Him is the firmest way for spreading justice, security, and welfare among men. So man will increase in affliction and misery because he has little faith in Allah or he has no faith in Him. B. Professing Allahs Oneness The Imām, peace be on him, said: If a sayer says: Why has it been made incumbent on them (men) to profess and recognize that Allah is One and Unique?

It is said: For reasons of which is that if He did not make profession and knowledge (of Him) obligatory on them (men), then it would be permissible for them to imagine (that there were) two directors or more than that; and if that was permissible, they would not distinguish the One Who created them from other than him, for every human being of them did not come to know (of Him), for he worshipped the one other than Him who created him, and obey the one other than Him who ordered him, so they were not sure of their Maker and Creator; neither the command of the commander nor the prohibition of the prohibiter is established with them; therefore, the commander himself is not known; nor is the prohibiter (distinguished) from other than him.