هادی سلیمانی ابهری - .Assistant professor in the University of Zanjan., and Faculty member of Zanjan University- Islamic studies department

In this article, a part in the life of Augustine and Ghazali, with common features during the period of internal transformation, especially in their spiritual dimension and moral conduct, has been discussed. Similarities that are based on the same apprehension for the painful search of the method of obtaining certainty and the meaning of prosperity, and the way of behavior in achieving happiness and moral virtues.  In this research, which was formed by descriptive-historical method and library study, while shining light on common states  for  Ghazali and Augustine in spiritual and moral aspects, the contexts of their mental and spiritual evolution are explained in an epistemological and methodological reflection, and in an intuitive way both in Achieving certainty and attaining happiness by returning to God and gaining His pleasure through instilling moral virtues is emphasized, and after that, Augustine's and Ghazali's moral system for achieving prosperity is compared and pointed to their integrated moral system. Also in the last part of this article, different aspects of Ghazali compared to Augustine, such as the acceptance of the dignity of reason in the end of  life and his avoidance of restrictions regarding the happiness of followers of religions, are examined.

Ghazali, Augustine, Certainty, happiness, intuition