The two important topics of Tawallī and Tabarrī—meaning, love for the friends of God and disavowal of His enemies—have been enjoined in numerous verses of the Quran. The study of these two principles in Quranic and narrative sources is of great importance due to the role of both in the felicity and damnation of the faithful individual. The clarification and analysis of their various functions in the doctrinal, psychological, and behavioral dimensions is the objective of the current paper. The result of the research findings, using a descriptive-analytical method based on library documentation, points to this important reality: that each of the topics of Tawallī and Tabarrī in supplications and visitations has tangible and real outcomes for the individual and collective life of the members of Muslim society. Based on the supplications and visitations, doctrinal aspects, such as: "Establishing [oneself] in the radius of monotheism, providing felicity and perfection, a sign of practicing piety, a sign of proximity to the divine threshold,"... and matters such as: "Strengthening human resolve and will, injecting a positive spirit into the members of society, and providing desirable role-modeling for the community, and ultimately, [as] a fundamental tool in the survival of the victory of truth over falsehood and preparing the groundwork for the implementation of the principle of commanding good and forbidding evil, can be enumerated among the spiritual and practical functions of Tawallī and Tabarrī."