What verses in the Quran are about spiritual peace?

The question regarding spiritual peace in the Holy Quran is profoundly significant and foundational, as inner peace and tranquility of the soul are deep, natural yearnings within every human being. The Noble Quran, in its sublime wisdom, illuminates the path to achieving this true serenity in the most beautiful and complete manner. This divine book introduces peace not merely as a fleeting emotion but as a stable and intrinsic state rooted in a profound connection with the Almighty Creator. One of the most explicit and beautiful verses that directly addresses spiritual peace is found in Surah Ar-Ra'd, verse 28: "الَّذِينَ آمَنُوا وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ اللَّهِ ۗ أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ" (Those who have believed and whose hearts are assured by the remembrance of Allah. Unquestionably, by the remembrance of Allah hearts are assured). This noble verse serves as the central point in discussing spiritual peace from the Quranic perspective. "Dhikr Allah," or the remembrance of Allah, encompasses a much broader meaning than merely reciting words or verbal supplication. The remembrance of Allah includes prayer (Salah), recitation of the Quran, contemplation of divine signs, mindfulness of His blessings, awe of His majesty, and ultimately, living life with constant awareness of God's omnipresence. When a person is mindful of God in every moment and every action, knowing that He is ever-watching and present, they are liberated from worldly anxieties and attain a tranquil heart. This remembrance imbues the individual with strength to endure adversities, hardships, and despair. It teaches that everything is under the absolute power of the Divine, rendering future worries meaningless, for the management of all affairs rests with Him. This 'dhikr' is not merely a verbal repetition; rather, it signifies a deep presence of heart and an awareness of God in all aspects of life. It's a presence that prevents a person from feeling weak or alone in the face of challenges, instead allowing them to lean on the infinite source of divine power and mercy. This continuous connection with the Creator eradicates the root causes of restlessness, such as fear of the future, regret over the past, and anxiety about the present. The Quran also introduces the concept of "Sakinah," which denotes divine tranquility, serenity, and solemnity that Allah bestows upon the hearts of believers. This Sakinah is a blessing that helps believers remain steadfast and alleviates their concerns during stressful and challenging moments. In Surah Al-Fath, verse 4, Allah says: "هُوَ الَّذِي أَنزَلَ السَّكِينَةَ فِي قُلُوبِ الْمُؤْمِنِينَ لِيَزْدَادُوا إِيمَانًا مَّعَ إِيمَانِهِمْ ۗ وَلِلَّهِ جُنُودُ السَّمَاوَاتِ وَالْأَرْضِ ۚ وَكَانَ اللَّهُ عَلِيمًا حَكِيمًا" (It is He who sent down tranquility into the hearts of the believers that they might add [another increment of] faith to their [present] faith. And to Allah belong the soldiers of the heavens and the earth, and ever is Allah Knowing and Wise). This verse indicates that Sakinah not only brings peace but also strengthens faith. This peace is an active one, propelling individuals towards righteous deeds and greater steadfastness, rather than a passive indifference or lethargy. Sakinah is a divine gift granted to those whose hearts are filled with faith and submission to the Divine will. It is a reward for sincerity and perseverance in the path of truth. 'Sakinah' acts as a shield against the assaults of devils and the temptations of the self, protecting the heart from any wavering or doubt. This state of heart enables the believer to maintain their inner peace even in the most difficult circumstances and to move forward with certainty in God, knowing that the absolute divine power is their support. Furthermore, the Holy Quran articulates peace through the elimination of fear and grief for the "Awliya Allah," or the friends of Allah. In Surah Yunus, verses 62 to 64, it states: "أَلَا إِنَّ أَوْلِيَاءَ اللَّهِ لَا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ * الَّذِينَ آمَنُوا وَكَانُوا يَتَّقُونَ * لَهُمُ الْبُشْرَىٰ فِي الْحَيَاةِ الدُّنْيَا وَفِي الْآخِرَةِ ۚ لَا تَبْدِيلَ لِكَلِمَاتِ اللَّهِ ۚ ذَٰلِكَ هُوَ الْفَوْزُ الْعَظِيمُ" (Unquestionably, [for] the allies of Allah there will be no fear concerning them, nor will they grieve. Those who believed and used to fear Allah - for them are good tidings in the worldly life and in the Hereafter. No change is there in the words of Allah. That is the great success). These verses illustrate that the pinnacle of spiritual peace is attained when one reaches the status of "Wali Allah," becoming a friend and intimate of God. This status is achieved through sincere faith and God-consciousness (Taqwa). When a person detaches their heart from worldly attachments and places their trust in God, they are freed from the fear of the future and the grief of the past. This kind of peace transcends temporary worldly comforts and provides a sense of security and bliss in all circumstances. This glad tiding signifies not only a bright future in the Hereafter but also includes peace and prosperity in this worldly life. For one who has surrendered themselves to God and seeks only His pleasure is liberated from the chains of fears and sorrows, experiencing inner joy and contentment in every situation. Reliance upon Allah (Tawakkul) is another crucial pillar in achieving peace. When an individual entrusts their affairs to God, confident that Allah is the best Disposer of affairs, they are relieved of the heavy burden of worries and anxieties. The Quran repeatedly advises believers to place their trust in Allah, and the result of this trust is peace of heart. Additionally, patience (Sabr) and prayer (Salah) are emphasized as vital tools for acquiring peace in daily life. Surah Al-Baqarah, verse 153, states: "يَا أَيُّهَا الَّذِينَ آمَنُوا اسْتَعِينُوا بِالصَّبْرِ وَالصَّلَاةِ ۚ إِنَّ اللَّهَ مَعَ الصَّابِرِينَ" (O you who have believed, seek help through patience and prayer. Indeed, Allah is with the patient). Patience enables a person to maintain their composure in the face of difficulties, and prayer establishes a direct connection with the Creator, leading to closeness and consequently, peace. In summary, the verses of the Holy Quran clearly demonstrate that spiritual peace is a divine gift attained through servitude, faith, reliance on God, remembrance of Allah, and piety. This peace is internal and enduring, helping individuals maintain a tranquil heart and a serene soul in a bustling and challenging world. By outlining these principles, the Quran provides a comprehensive and complete guide to achieving true happiness and lasting peace in both this world and the Hereafter. These teachings are not mere theories; they outline a practical way of life, enabling anyone who adheres to them to taste the sweet flavor of divine peace and enjoy life with a tranquil heart. The Quran emphasizes that this genuine peace is the result of drawing near to the Source of existence and entrusting affairs to Him, rather than fruitless attempts to control all aspects of life, which often lead to anxiety and despair. This Quranic perspective on peace empowers individuals to face life's challenges with a different approach, knowing that whatever happens is by divine permission and wisdom, and will ultimately lead to their good. This inner certainty liberates them from any despair and provides them with the energy to walk on the path of divine pleasure.