Purpose: This paper aims to elucidate al-Ghazali and Maimonides ontological arguments in proving God’s existence by analysing their theological writings. In the golden age of Islamic civilization, fellow Jewish and Christian were seen to be engaged in theological discourse with Muslim scholars. In adjacent, al-Ghazali and Maimonides were seen playing vital roles in affirming the existence of God in their respective religions. Methodology: This paper is qualitative in nature and employs content analysis. Both al-Ghazali and Maimonides’ arguments are then analysed comparatively. Comparative theology is done to examine theological discourse as part of inter-religious dialogue. Main Findings: This study finds that their arguments differ in inte...