The Quran repeatedly emphasizes the fleeting and temporary nature of dunya, contrasting its ephemeral allure with the everlasting reality of the akhirah. Verses highlight that the worldly life is not but amusement and diversion and a 57:20, much like a plant growth that pleases tillers but then dries, yellows, and becomes scattered debris. This imagery underscores the temporary and ultimately deceptive nature of worldly pleasures.

Ibn Kathir explains that the things beautified for mankind in this life, such as women, children, and wealth, are "the delights of this life and its short-lived joys," whereas Allah has the excellent return with Him in the Hereafter. Ma'arif-ul-Quran further elaborates on the wisdom behind man's natural inclination towards these worldly things, noting that this attraction is a test, meant to see who becomes engrossed in ephemeral pleasures and who uses them as a means to achieve success in the eternal life. The pursuit of these worldly attractions without a focus on the Hereafter is likened to a "game and amusement", which ultimately leads to spiritual loss.

The Quran warns those who have bought the life of this world [in exchange for the Hereafter] that their punishment will not be lightened. This choice, as Ibn Kathir notes, means they "prefer this life to the Hereafter." Similarly, those who are 9:38 are cautioned about the minimal enjoyment of dunya compared to the eternal reward. This preference for the immediate over the eternal is explicitly condemned, with such individuals described as those for whom Allah does not guide the disbelieving people because they have "preferred the worldly life over the Hereafter."

In direct contrast to dunya, the akhirah is portrayed as the ultimate and eternal abode, offering a superior and enduring reward for the righteous. The home of the Hereafter is best for those who fear Allah and indeed, that is the [eternal life, if only they knew]. This eternal aspect makes the Hereafter the primary focus for believers, as its blessings are incomparable and without end.

Ma'arif-ul-Quran explains that belief in the Hereafter is a "revolutionary belief" because it inspires individuals to translate faith into practice, motivating them to act in accordance with God's commandments. This belief provides a strong deterrent against crime and establishes a harmony between one's private and public behavior, knowing that every deed is observed and recorded. Ibn Kathir highlights the concept of yaqin (certainty) in the Hereafter, which includes belief in resurrection, judgment, Paradise, and Hell, emphasizing that this certainty facilitates obedience to Allah.

The rewards of the Hereafter are described vividly: good tidings in the worldly life and in the Hereafter, and for the pious, Gardens (Paradise) with their Lord, underneath which rivers flow. These gardens offer eternal dwelling, purified spouses, and, most importantly, approval from Allah, which is presented as the greatest of all blessings. According to Ma'arif-ul-Quran, this approval ensures that there is no danger of displeasure from Allah, and the blessings will never be taken back or reduced.

The distinction between dunya and akhirah is fundamentally about human choice and its eternal consequences. Individuals are presented with a clear dichotomy: seeking the reward of this world or the reward of the Hereafter. The Quran states, 3:145. This verse indicates that both aspirations can be met in their respective spheres, but the ultimate value lies in the eternal. Ibn Kathir explains that those who prioritize this life will only receive what Allah has decreed for them, but will have no share in the Hereafter, whereas those who strive for the Hereafter will receive a share there, along with some provision in this life.

The choices made in dunya determine one's fate in akhirah. Those who exchange guidance for error are described as having "purchased error with guidance," leading to a profitless commerce and a lack of guidance. Ibn Kathir notes that this includes those who believed and then disbelieved, preferring deviation over righteousness. Such individuals, by their actions, seal their own hearts against truth and guidance. Ma'arif-ul-Quran further explains that ignoring divine favor leads to growing disobedience and sin, eventually darkening the heart until one can no longer distinguish between good and evil, a state described as Rain (rust) on their hearts.

Conversely, those who believe and do good deeds, aligning their worldly actions with spiritual goals, are promised a great reward and ultimate success. This includes those who sacrifice their worldly lives for the cause of Allah. The Quran encourages a prayer that encapsulates this balance: Our Lord, give us in this world [that which is good and in the Hereafter that which is good and protect us from the punishment of the Fire]. Ibn Kathir explains that this comprehensive supplication encompasses all good aspects of both lives and seeks protection from all forms of evil.

Faith (Iman) in the Hereafter is a cornerstone of Islamic belief and practice. The Quran defines the God-fearing (Muttaqin) as those who believe in the Ghayb and perform Salah, and spend out of what we have provided for them. This belief in the unseen, particularly the Hereafter, is what motivates righteous conduct. Ma'arif-ul-Quran emphasizes that true faith requires certitude in the Hereafter, not just oral affirmation, a certainty that transforms human life and leads to guidance and success.

Righteous deeds, performed with sincerity and devotion, are the means to attain the blessings of the Hereafter. This includes steadfastness in prayer, giving zakat, and avoiding major sins. The verse If you avoid the great sins which you are forbidden to do, We shall remit from you your (small) sins highlights the importance of avoiding major transgressions, promising forgiveness for minor ones as a result. Ibn Kathir clarifies that repentance is essential for major sins, and performing righteous deeds like ablution and prayer serve as expiation for minor ones, provided major sins are avoided. The connection between earthly actions and heavenly rewards is direct: For men there is reward for what they have earned, (and likewise) for women there is reward for what they have earned. This emphasizes individual accountability and the value of personal effort in both spiritual and worldly endeavors.

The concept of Taqwa (fear of Allah) is repeatedly linked to success in the Hereafter. Those who possess Taqwa are promised a better abode, forgiveness, and protection from the Fire. Ibn Kathir explains that Taqwa involves worshipping Allah alone, fulfilling His commands, and avoiding His prohibitions. The pious are described as “those who are patient” in obedience, true in their faith, obedient to Allah, “those who spend” in His cause, and those who pray and beg Allah's pardon in the last hours of the night. These are the qualities that secure divine pleasure and an excellent return.

The concept of the Hereafter underscores Allah's perfect justice and the ultimate accountability for all actions. Every soul will be judged for its deeds, with no injustice whatsoever. The Quran declares that each person will be paid in full what he has earned and they will not be dealt with unjustly. This justice extends even to animals, which will receive retribution from one another before being turned to dust, a testament to Allah's "utmost regard for equity and justice" (Ma'arif-ul-Quran).

Disbelievers and hypocrites are warned of severe punishments. Those who betray covenants and turn away from truth are cursed by Allah and will face a "mighty chastisement" (2:7, 3:86). Their good deeds in this world will be lost in this world and in the Hereafter, offering them no benefit. This includes those who spend their wealth to be seen by others, whose actions, lacking sincerity, will be of no avail. Ibn Kathir describes the fate of such individuals: they will find themselves in the lowest depths of the Fire, with no helper or relief from torment.

The journey to the Hereafter involves a transition through death and subsequent resurrection. Allah reminds mankind that you were dead and He gave you life; then He shall make you dead; then He shall give you life; then to Him you shall be returned. This sequence highlights Allah's absolute power over life and death and serves as a clear proof for the Resurrection. Ma'arif-ul-Quran explains that the "life in Barzakh" (the intermediary period between death and resurrection) is a precursor to the ultimate reckoning, where individuals begin to experience preliminary rewards or punishments. This continuous cycle of life and death, culminating in the final return to Allah, emphasizes the importance of living a life of conscious obedience and faith.

In conclusion, the Islamic understanding of worldly life (dunya) and the Hereafter (akhirah) is a cohesive framework that provides meaning and direction to human existence. The transient nature of dunya serves as a continuous reminder to strive for eternal rewards, while the certainty of the akhirah reinforces the principles of justice, accountability, and righteous action. Through the Quran and Sunnah, believers are guided to a balanced life, where worldly pursuits are integrated with spiritual growth, ensuring a successful journey towards their ultimate destiny with Allah.