Mysticism refers to the spiritual belief that a connection can be established with a divine presence, truth, or reality beyond intellectual understanding or material existence. It often involves profound spiritual experiences, insights, or states of consciousness that are achieved through meditation, prayer, contemplation, or other practices focused on transcending the normal, everyday experience of reality. Mysticism is found within many religious traditions, including Christianity, Islam (especially Sufism), Judaism (particularly Kabbalah), Hinduism, Buddhism, and others, each with its own unique characteristics and practices aimed at achieving union or communion with the divine or ultimate reality.

At its core, mysticism seeks to explore and experience the inner, mystical dimensions of faith and existence, often emphasizing personal experiences of the divine over doctrinal beliefs or external rituals. These experiences are frequently described as encounters with God or the ultimate reality that are ineffable, that is, beyond words and conceptual understanding, leading to a transformation of the mystic's perception of themselves and the world around them.