Srila Bhaktisiddhanta Sarasvati Thakura says that all writers after Vrndavana dasa Thakura who are pure devotees of Sri Caitanya Mahaprabhu and who have tried to describe the Lord's activities are to be considered like Vyasa. Srila Vrndavana dasa Thakura is the original Vyasadeva in describing caitanya-lila, and all others who follow in his footsteps by describing Sri Caitanya Mahaprabhu's pastimes are also to be called Vyasadeva. The bona fide spiritual master is called Vyasa because he is a representative of Vyasa. Worshiping the birthday of such a spiritual master is called Vyasa-puja.