By prayer one acknowledges God's power and goodness, and one's own neediness and dependence. It is therefore an act of the virtue of religion implying the deepest reverence for God and habituating a person to look to him for everything. Prayer presupposes faith in God and hope in his goodness.
Prayer may be expressed vocally or mentally. Vocal prayer may be spoken or sung. Mental prayer can be either meditation or contemplation. The basic forms of prayer are praise, petition (supplication), intercession, and thanksgiving.