The Quran explicitly states that Satan 2:169. This highlights that evil is primarily associated with disobedience to Allah and fabrication against His divine truth. Tafsir al-Jalalayn clarifies that "evil" here refers to sin, while "immorality" encompasses what is abhorred by the Law. Ibn Kathir explains that Satan's "footsteps" (his ways and methods) lead to misguidance, including prohibiting what Allah has made lawful and enticing followers to commit acts of disobedience. The Prophet Muhammad ﷺ emphasized this distinction, stating, "I have created My servants Hunafa' (pure or upright), but the devils came to them and led them astray from their (true) religion and prohibited them from what I allowed for them" (Tafsir Ibn Kathir 2:169).

The concept of evil is not merely external but also internal. Satan whispers “evil into the breasts of mankind”, an insidious act clarified by al-Jalalayn as occurring "whenever they neglect to remember God." Ma'arif-ul-Quran further explains that "Shaitan is so named because he puts himself in a squatting perched position on the heart of man. So, when the latter becomes heedless, the former whispers, but when he remembers Allah, he withdraws furtively." This internal struggle is a constant reality for humanity, as a Hadith narrated by Anas states: "Allah has built two houses in the heart of man, in one of which an angel resides and in the other the Shaitan. The angel urges him to do good works and the Shaitan induces him to do evil works" (Ma'arif-ul-). This shows that the inclination towards good and evil is an inherent aspect of human nature, with external and internal influences constantly at play.

A core tenet in Islam concerning evil is the principle of divine justice, where individuals are held accountable for their actions. The Quran states, 6:160. This verse is clarified by Ibn Kathir as demonstrating that while good deeds are multiplied tenfold or more, evil deeds are recompensed with "the same" punishment, unless Allah forgives them. Ma'arif-ul-Quran underscores this, citing a Hadith Qudsi: "A person who commits one sin will get its punishment equal to one sin only, or I shall forgive even that." This divine generosity in rewarding good and lenient approach to punishing evil is a testament to Allah's mercy.

The earthly manifestation of evil often does not meet immediate or full recompense, a reality that necessitates the Day of Judgement. As Ma'arif-ul-Quran explains, "no one receives his full measure of reward or punishment for the good or bad deeds he does in this world... If there is no such world as the Hereafter and accountability, then the thief or the robber would be thought to be better than the respectable university graduate." Therefore, the Hereafter is presented as the realm where 99:8, a verse described by Abdullah Ibn Mas'ud as "most robust and comprehensive" (Ma'arif-ul-). The earth itself will bear witness to these deeds on that Day, declaring its information as inspired by its Lord (Tafsir Ibn Kathir 99:4).

Despite the clear warnings and the promise of divine justice, the Quran acknowledges the pervasive nature of evil in the world: 5:100. Tafsir Ibn Kathir explains this to mean that "the little permissible is better than the abundant evil." Ma'arif-ul-Quran elaborates that humanity is sometimes "awed by the abundance of things evil and impure," leading them to mistake quantity for quality. This verse thus cautions against being swayed by the prevalence of wrongdoing and emphasizes adherence to divine principles.

Believers are continuously called to actively combat evil and uphold good. This involves not only abstaining from direct wrongdoing but also promoting justice. Allah 4:148. Ibn Kathir clarifies that while uttering evil in public is generally disliked, a wronged person is permitted to invoke Allah against their oppressor, though patience is deemed better. This principle extends to social interactions, where the Prophet ﷺ advised, "The worst people, in the sight of Allah are those whom the people leave (undisturbed) to save themselves from their dirty language" Bukhari 78:158.

The struggle against evil is an ongoing process, requiring constant vigilance and a firm resolve. Hudhaifa bin Al-Yaman's narration illustrates this, as he asked the Prophet ﷺ about evil for fear that it might overtake him Bukhari 61:113. The Prophet ﷺ affirmed that evil would exist after good times, and advised adherence to the community of Muslims and their Chief, and to "keep away from all those different sects, even if you had to bite (i.e. eat) the root of a tree, till you meet Allah while you are still in that state" (Bukhari 61:113, 92:35). This highlights the importance of holding fast to the established truth amidst widespread deviation.

Islamic jurisprudence (Fiqh) operationalizes the divine commands to avoid evil through a system of laws and ethical guidelines. The prohibition of injustice, theft, murder, and fornication are central. For instance, the Quran forbids consuming the property of orphans unjustly, declaring it a great sin. Ibn Kathir warns that those who "unjustly eat up the property of orphans, they eat up only a fire into their bellies." The Prophet ﷺ included "to consume an orphan's property" among the "seven great destructive sins" Bukhari 4:8.

The severe punishments (Hudud) prescribed for certain crimes like highway robbery, theft, and adultery underscore the gravity of these evils in Islam. Ma'arif-ul-Quran explains that these punishments are enforced as the "Right of Allah" (Haqqullah) and cannot be waived, even by the victim. This is distinct from Qisas (retaliation), where the victim's guardian has the right to forgive. The legal framework is designed to prevent societal corruption and ensure justice, serving as a deterrent against actions that cause "mischief in the land." Even the firm intention to commit a sin is considered a sin, though actual performance is worse (Ma'arif-ul-), emphasizing the importance of internal purity alongside outward conduct.

Beyond legal frameworks, Islam stresses profound spiritual vigilance against evil, particularly against the whispers of Satan. The last two chapters of the Quran, Surat al-Falaq and Surat an-Nas, are potent supplications for refuge from various forms of evil, including the evil of the retreating whisperer. This "retreating whisperer" (al-waswas al-khannas) is Satan, who "whispers evil into the breasts of mankind". Tafsir Ibn Kathir explains that this devil "blows into the heart of the Son of Adam when he is sad and when he is happy. But when he (man) remembers Allah, Shaytan withdraws." This highlights the crucial role of dhikr (remembrance of Allah) in repelling evil suggestions.

The Quran also prohibits coveting what Allah has given others, as this can lead to envy and destructive actions. Ma'arif-ul-Quran explains that this prohibition prevents "disorders" like theft, robbery, and murder, which often sprout from such desires. Instead, believers are encouraged to "pray to Allah for His grace," trusting in His wisdom and knowledge in distributing blessings. This spiritual discipline fosters contentment and guards the heart against the inner workings of evil.

In conclusion, the Islamic perspective on evil is multifaceted, encompassing its theological origins, its pervasive presence in human experience, the divine system of justice for its recompense, the legal measures for its societal containment, and the profound spiritual remedies for individual protection. From the Quranic verses detailing Satan's insidious plots to the Prophetic guidance on character and justice, and the nuanced interpretations of classical scholars, Islam provides a comprehensive framework for understanding, resisting, and ultimately overcoming evil by aligning one's life with the will of Allah and striving for righteousness in every aspect.