Final answer:
Priests are full-time religious practitioners who serve as intermediaries between God and humans, whereas shamans are part-time religious specialists who work with clients to address specific needs by making direct contact with deities or supernatural forces.
Step-by-step explanation:
Priests
Priests are full-time religious practitioners who serve as intermediaries between God (or the gods) and humans. They officiate at recurring ritual events and set the rules associated with worship practice. They derive their authority from scripture and their occupational position in a religious institution. Priests are typically well-educated and may have specific qualifications or lifestyle restrictions depending on their religious tradition.
Shamans
Shamans are part-time religious specialists who work with clients to address specific and individual needs by making direct contact with deities or supernatural forces. They are like medical psychologists who address individual needs. Shamans have the ability to transcend normal reality and communicate with supernatural forces in an alternate world. They may be called upon for divination, healing, and other spiritual practices.