Complex sentence: Scholars praised this epistle although its part was the same as hagiography of John of Rila written by Evtimiy of Tarnovo because it corresponds with Byzantine practice and genre principle based on universal and common forms, not on individual ones.
Split into simpler sentences: Scholars praised this epistle although its part was the same as hagiography of John of Rila written by Evtimiy of Tarnovo. Similarity of the medieval texts written on the Balkans corresponds with Byzantine practice and genre principle which was based on the universal and common forms, not on the individual ones.