Connecting with the Creator has always been a fundamental human need, and the impulse to worship the One Lord is clearly evident across all divine religions. This need finds its most flourishing and perfected expression within the religion of Islam, particularly among the Shia. The present study aims to elucidate the psychological and spiritual functions of supplication regarding human mental health and spirituality, with a specific focus on traditions attributed to Imam Reza (peace be upon him). This study employs an analytical-descriptive method, with data gathered and analyzed based on authoritative sources in Hadith, exegesis (Tafsir), and psychologyThe Eighth Imam of the world's Shia Muslims offered prayers tailored to specific occasions and addressing the conditions and the physical and spiritual suffering of the faithful; turning to these prayers undoubtedly resolves many hardships and problems, serving as an antidote to the spiritual and physical wounds of individuals in society. Research findings indicate that prayer and supplication, beyond their individual and devotional functions, play an unparalleled role in fostering human spiritual and psychological well-being. Key spiritual benefits of prayer include a "sense of success and progress," "inner peace and assurance," "self-esteem," "psychological transcendence," and "spiritual self-actualization." Furthermore, Razavi traditions indicate that realizing these functions requires observing various etiquettes, the most significant of which include: designating specific times and places, seeking intercession through the Ahl al-Bayt (peace be upon them), relying on God, sincerity, humility, expressing one’s need, combining supplication with seeking forgiveness, supplicating during times of ease, praying in private, extending the scope of supplication to others, and accompanying supplication with righteous deeds. In examining the obstacles to the answering of prayers, the traditions of Imam Reza (peace be upon him) point to three primary factors: "Divine wisdom regarding what is best", "abandoning the duty of enjoining good and forbidding evil," and "disobedience toward parents." These factors demonstrate the inextricable link between personal ethics, social responsibility, and the answering of prayers. Research findings indicate that, from the perspective of Imam Reza (peace be upon him), supplication—when performed in accordance with the tenets of Sharia and the prescribed etiquettes—serves not only as a weapon to ward off calamity and divine punishment but also as a sign of Imamate and a means of elevating one's human station.