The Holy Quran, as a comprehensive and revealed text, does not merely rely on prescriptive or definitional statements to convey lofty ethical concepts. Instead, it employs a variety of artistic and diverse expression techniques to present ethical messages in an impactful and enduring format. Techniques such as parables, oaths, questions and answers, conditions and consequences, rhetorical questions, the use of prophetic stories, and brevity and elaboration are among the most significant rhetorical elements of the Quran. Each technique serves a unique function in conveying ethical concepts, tailored to the subject, context, and audience. This study, utilizing a descriptive-analytical method and referencing the ethical verses of the Quran along with reputable interpretations from both Shia and Sunni scholars (such as Al-Mizan, Majma’ al-Bayan, and Tafsir al-Kabir by Fakhr al-Razi), aims to analyze these techniques to demonstrate how Quranic eloquence serves the moral education of individuals, instilling ethical messages such as truthfulness, forgiveness, patience, piety, humility, and more in the hearts of its audience. The findings of the research indicate that the expression techniques of the Quran not only possess artistic and aesthetic qualities but also play a central role in rational persuasion, emotional stimulation, and guiding the ethical will of the audience.