Belief systems that encompass various personal and institutional relationships between human beings and what they regard as holy, sacred, or divine, usually but not always a deity, or a spiritual or occult force. Participation in a religion is typically manifested in obedience, reverence, and worship, often including group activities and alliance with a leader. Elements of a religion or similar belief system include doctrine, ritual, defined parameters of morality, and a code of living, often seen as a means of achieving spiritual or material improvement.