The psalmody is a deep spiritual monument based in the order of the Holy Liturgy. It was placed through the guidance of the Holy Spirit. This is clear from the words of the psalmody, which are taken from the Holy Bible, the Book of Psalms, and from the accurate and deep theological understandings. These understandings can be found in its tunes which move the emotions and stays in the sky of the spirit. Thus bringing a person closer and closer to God and helping him easily towards the life of meditation in His characteristics and works.
--His Grace Bishop Hedra, Praises Explained