Unitarian Universalism is a liberal religious movement characterized by a "free and responsible search for truth and meaning". Unitarian Universalists assert no creed, but instead are unified by their shared search for spiritual growth. Unitarian Universalists do not have an official, unified corpus of sacred texts but rather draw inspiration and guidance from the six sources: personal experience, prophetic utterances, world religions, Jewish and Christian teachings, humanist teachings, and spiritual teachings. Unitarian Universalist congregations include many atheists, agnostics, deists, and theists; there are churches, fellowships, congregations, and societies around the world.

The meaning of spirituality has developed and expanded over time, and various meanings can be found alongside each other. Traditionally, spirituality referred to a religious process of re-formation which "aims to recover the original shape of man", oriented at "the image of God" as exemplified by the founders and sacred texts of the religions of the world. The term was used within early Christianity to refer to a life oriented toward the Holy Spirit and broadened during the Late Middle Ages to include mental aspects of life.