"Tranquil Heart" is a profound exploration of inner peace, spiritual contentment, and the Islamic approach to achieving a harmonious life. Rooted in the teachings of the Holy Quran, Hadith, and the wisdom of scholars and mystics, this book delves into the importance of patience (Sabr), gratitude (Shukr), reliance on Allah (Tawakkul), and purification of the soul (Tazkiyah al-Nafs). Readers will gain insights on how to cultivate a peaceful heart amidst life’s challenges by developing strong faith, trust in divine wisdom, and ethical character. This book serves as a guide to self-purification, emotional well-being, and achieving true tranquility through Islamic spirituality.