Prayer (from the Latin precari "to ask earnestly, beg, entreat") is an invocation or act that seeks to activate a rapport with an object of worship through deliberate communication.
Prayer can be a form of religious practice, may be either individual or communal and take place in public or in private. It may involve the use of words, song or complete silence. When language is used, prayer may take the form of a hymn, incantation, formal creedal statement, or a spontaneous utterance in the praying person. There are different forms of prayer such as petitionary prayer, prayers of supplication, thanksgiving, and praise. Prayer may be directed towards a deity, spirit, deceased person, or lofty idea, for the purpose of worshipping, requesting guidance, requesting assistance, confessing transgressions (sins) or to express one's thoughts and emotions. Thus, people pray for many reasons such as personal benefit or for the sake of others (called intercession).
Some anthropologists believe that the earliest intelligent modern humans practiced a form of prayer. Today, most major religions involve prayer in one way or another ; some ritualize the act, requiring a strict sequence of actions or placing a restriction on who is permitted to pray, while others teach that prayer may be practiced spontaneously by anyone at any time.
Scientific studies regarding the use of prayer have mostly concentrated on its effect on the healing of sick or injured people.
