Tolerance is considered one of the fundamental ethical and intellectual principles in Islam, representing a central axis for achieving balance between the individual and society, between rights and duties, and between moderation and mercy in interpersonal interactions. This study aims to analyze the concept of tolerance in Islamic thought through the Quranic texts, the Prophetic traditions, and classical jurisprudential and philosophical sources, highlighting its ethical, social, and intellectual dimensions. The study adopts a descriptive-analytical approach, enabling the exploration of the meanings of tolerance in religious and intellectual texts, while comparing the perspectives of Islamic jurists and philosophers across different historical periods. The findings indicate that tolerance in Islam is not merely an individual moral sentiment or attitude but a comprehensive jurisprudential and social principle based on justice, moderation, mercy, self-restraint, and respect for others. The study also demonstrates that tolerance promotes peaceful coexistence, mitigates intellectual and social conflicts, and contributes to building a balanced society governed by spiritual and social security, grounded in the Islamic value system that balances rights and duties, as well as individual freedom and public interest. Keywords: Tolerance, Islamic Thought, Traditional Sources, Quran, Hadith, Peaceful Coexistence