While living in London in the years 1926–28 Yehuda Leib HaLevi Ashlag, known as Baal HaSulam, a prominent Kabbalist, composed his cycle Melodies of the Upper Worlds which are heard in this recording in piano arrangements by Mikael Ayrapetyan. Many of the melodies are composed to text fragments from Kabbalistic sources and enshrine an aspiration to sense the spiritual world in a direct appeal to the heart.