sentences:  In religion, a ritual can comprise the prescribed outward forms of performing the "cultus", or cult, of a particular observation within a religion or religious denomination.Although ritual is often used in context with worship performed in a church, the actual relationship between any religion's doctrine and its ritual(s) can vary considerably from organized religion to non-institutionalized spirituality, such as ayahuasca shamanism as practiced by the Urarina of the upper Amazon.Rituals often have a close connection with reverence, thus a ritual in many cases expresses reverence for a deity or idealized state of humanity.