This text presents a Qur'anic and analytical study of Tawhid, placing Divine Unity at the centre of Islamic belief and understanding. The study is grounded in a rational methodology and reliable sources, with particular reliance on the methodological foundations of Allama al-Tabataba'i and Sayyid Kamal al-Haydari. 

It explains the foundations of God's Essence, Attributes, and Actions while addressing common misconceptions about monotheism. The study also examines the relationship between Tawhid and Prophethood, showing how correct knowledge of God shapes faith and worship. By combining Qur'anic evidence with rational analysis, it offers a clear framework for understanding Islamic creed and responding to contemporary theological questions with clarity and balance.