發起起立塔像，書寫經典等，摠關於佛道善根之人也。此人以此善根願成佛或往生，故名為願主，又曰本願。無量壽經下曰：「起立塔像，飯食沙門。懸繒然燈，散華燒香。以此迴向，願生彼國。」
The original resolve in a previous existence which incites a man to build a pagoda, copy a sutra, etc., leading him to become Buddha or reach the Pure Land.
一願主 又作本願主、發願主、本願。指發願興隆三寶者，或造立寺院、經像，或懸繪、燃燈，或散花、燒香，或設齋供僧等；依此功德，藉以迴向往生極樂國土。〔無量壽經卷下〕p8414