So we should pray the Lord’s Prayer but once in our lives? What about hymns and praise songs, are they only to be sung once?
Of course, as it would be boring and repetitive to repeat them as the pagans do /sarc
Many of the institutionalized prayers are so well known because of their beauty and their ability to say what is clearly in our hearts without our scattered confusion and the principalities of evil distracting us. Prayer is to bring us closer to God. To help us become more godlike (theosis). The meditation of repetitive heartfelt prayer is one method of doing so. Our focus is on the Triune God, not ourself or nothing, that is a difference from paganism.
Our Lord even gave us a prayer to repeat unless you believe he was actually trying to deceive us and lead us into evil.