Puja is the ceremonial act of showing reverence to a God or Goddess through invocation, prayer, song, and ritual. An essential aspect of puja for Hindus is communion with the Divine. The worshipper believes that with this contact she or he has established direct contact with the deity. Most often that contact is facilitated through an image: an element of nature, a sculpture, vessel, painting, or print. When the image is consecrated at the time of its installation in a shrine or temple, the deity is invited to invest the image with his or her cosmic energy. In the eyes of most devotees, the icon then becomes the deity, its presence reaffirmed by the daily rituals of honoring and invocation.
— Stephen P. Huyler, Meeting God