Satan

Imam Ali (AS) said, Be cautious of the enemy that enters the breast stealthily and whispers in the ears secretly.

Imam Ali (AS) said, Beware of the enemy of Allah, Iblīs, that he should not infect you with his disease [of evil] or entice you with his cavalry and his infantry, for he has aimed at you with the arrow of [false] threats and shot at you from close range.

Imam Ali (AS) said, He (Satan) has made them (the people) the target of his arrows, the ground that he steps on and the handle that he holds.

Imam Ali (AS) said, They have taken Satan as the overseer of their affairs and he has made them his partners [in crime], so he hatches [his eggs] in their breasts and creeps and crawls into their laps. He sees with their eyes and speaks with their tongues. He leads them to misdeeds and adorns for them idle talk like the action of one whom Satan has made partner in his domain and speaks falsehood through his tongue.

Imam Ali (AS) said, Your Lord, the Glorified, called you but you turned away and fled, and Satan called you so you responded and drew closer [to him].

Imam Ali (AS) said, Stand against Satan through struggle and overpower him by opposition, [by doing this] your souls will be purified and your statuses will be elevated in the sight of Allah.

Imam Ali (AS) said, The deception of Satan allures and entices.

Imam Ali (AS) said, Do not follow the claimants [of Islam] whose dirty water you drink along with your clean one, whose sicknesses you mix with your health and whose falsehood you allow to enter into your rightful matters.

Imam Ali (AS) said, Never allot a portion for Satan in your actions and do not give him access to your soul.