SHAFAQNA – Imam Ali (AS) said: O’ people, faithfulness is accompanied with truthfulness (honesty), which I do not know of any other stronger and more protective shield. The person, who is aware of his /her return to the hereafter, does not betray or deceive other people. But we live at a time which more of the people think deceitfulness is cleverness, and the ignorant individuals consider these people as prudent. How do they think? May God kill them! How often a person who knows about the future events, and knows all the tricks and wicked ways, but Divine Commands prevent him (from deception); and although he has the power to do that (kind of) acts, clearly abandons them. But the person, who has no fear of committing sins, or opposing the religion, uses the opportunities for deception (deceiving other people) .
 Nahjul Balaghah, Sermon 41.