瑜伽論記 11.103

11.103

四門分別：一、品類者有三：一、聞法無厭不退；二、恒大精進不退；三、生死苦恒不退。二、依止者有二：一、慚；二、勇。有慚者，不退。退者，可羞恥故。勇者，不退退非猛健故。三、自性者，謂欲樂大菩提，欲樂若迴即退故。四、差別者有三：一、未成謂信行地菩薩不退；二、成謂初地至七地菩薩不退；三、極成不退謂八地已上菩薩不退。故知以欲數為無厭倦體。

Analysis through four gates: First, types—there are three: 1. non-retrogression due to being insatiable in hearing the Dharma; 2. non-retrogression due to constant great vigor; 3. non-retrogression due to constant [endurance of] the suffering of saṃsāra. Second, bases—there are two: 1. shame (hrī); 2. courage. One who possesses shame does not retrogress, for to retrogress is shameful. One who possesses courage does not retrogress, for retrogression is not valiant. Third, essential nature—namely, aspiration for and delight in great bodhi; for if aspiration and delight turn away, one retrogresses. Fourth, distinctions—there are three: 1. not yet accomplished, which refers to the non-retrogression of bodhisattvas at the stage of practicing through faith; 2. accomplished, which refers to the non-retrogression of bodhisattvas from the first stage to the seventh stage; 3. fully accomplished non-retrogression, which refers to the non-retrogression of bodhisattvas on the eighth stage and above. Therefore, it is known that mental factor of aspiration (chanda) constitutes the essence of tirelessness.