What is Prayer and Why It Is Needed

God is spirit; and those who worship Him must worship in spirit and in truth. (John 4:24)

What then, is prayer? Prayer is the raising of the mind and heart to God in praise and thanksgiving to Him and in supplication for the good things that we need, both spiritual and physical. Prayers are spiritual because they are originally born in the (human) spirit and ripen there by the Grace of the Holy Spirit. In their origin they (i.e. prayers, psalms, hymns, etc.) were purely spiritual and only afterwards came to be clothed in words and so assumed an oral form (Bp. Theophan the Recluse)

How to Pray and Types of Prayer

But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door; pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly. (Matt. 6:6)

The room of the soul is the body; its doors are the five bodily senses. The soul enters its room when the mind does not wander here and there, roaming among the things and affairs of the world, but stays within, in our hearts. Our senses become closed and re main closed when we do not let them be passionately attached to external sensory things and in this way our mind remains free from every worldly attachment, and by secret mental prayer unites with God our Father.(St.Gregory Palamas)