This title is an abridged translation of Ayatollah Muhammad Hadi Mar'ifat's magnum opus, al-Tamhid fi uhum al-Qur'an, which is argueably an indispensable contemporary contribution to the Qur'anic studies. As an exemplar academic research, it delves into many crucial issues about the Qur'an and its history without taking sides. Its critical approach and cross-dimensional and denominational analyses makes it stand out as an example of a work which can form a bridge between the classic and the modern perspectives in the field.