俱舍論頌疏論本 27.27

27.27

釋曰：四無畏者，一、正等覺無畏，十智為體，猶如初力（釋初字也）。二、漏永盡無畏，或六智或十智為體，如第十力（釋十字也）。三、說障法無畏，八智為體，如第二力（釋二字也）。四、說出苦道無畏，或九智或十智為體，如第七力（釋七字也）。正等覺無畏者，謂佛自言：「我於諸法正等覺者，若有世間沙門、梵志、天魔、梵等依法立難，言：『佛如來於如是法非正等覺。』無有是處。設當有者，我於是事正見無畏，故得安穩無怖無畏。」漏永盡者，謂佛自言：「我於諸漏已得永盡，若沙門等依法立難，言：『佛於漏未得永盡。』佛為通釋，無怖畏故。」說障法無畏者，佛說染法必能為障，若外道難言：「染非能障。」佛為通釋，無怖畏故。說出苦道無畏者，佛說修道必能出苦。若外難言：「道非出苦。」佛為通釋，無怖畏故，答難無懼，故名無畏。

The explanation says: As for the four fearlessnesses: First, the fearlessness of complete awakening has the ten knowledges as its nature, just like the first power (explaining the word 'first'). Second, the fearlessness of having forever exhausted contaminants has six knowledges or ten knowledges as its nature, like the tenth power (explaining the word 'tenth'). Third, the fearlessness of expounding obstructing phenomena has eight knowledges as its nature, like the second power (explaining the word 'second'). Fourth, the fearlessness of expounding the path to deliverance from suffering has nine knowledges or ten knowledges as its nature, like the seventh power (explaining the word 'seventh'). As for the fearlessness of complete awakening, it refers to the Buddha himself saying: 'I am one who is completely awakened to all phenomena. If there should be any śramaṇa, brāhmaṇa, celestial Māra, Brahmā, or anyone else in the world who, according to the Dharma, raises a challenge saying: "The Buddha, the Tathāgata, is not completely awakened to such a phenomenon"—there is no such possibility. Even if there were, I have right view and fearlessness in this matter, and thus attain security without fear or dread.' As for the fearlessness of having forever exhausted contaminants, it refers to the Buddha himself saying: 'I have already attained the permanent exhaustion of all contaminants. If a śramaṇa or the like, according to the Dharma, raises a challenge saying: "The Buddha has not yet attained the permanent exhaustion of contaminants", the Buddha will explain and resolve it for them without fear or dread.' As for the fearlessness of expounding obstructing phenomena, the Buddha states that defiled phenomena certainly act as obstructions; if tīrthikas challenge saying: 'Defilement is not capable of obstructing', the Buddha will explain and resolve it for them without fear or dread. As for the fearlessness of expounding the path to deliverance from suffering, the Buddha states that cultivating the path certainly delivers from suffering; if an external challenger says: 'The path does not deliver from suffering', the Buddha will explain and resolve it for them without fear or dread. Because there is no fear in answering challenges, they are called fearlessnesses.