佛頂尊勝陀羅尼經教跡義記 2.67

2.67

唐云一切障清淨。解曰：一切障清淨者，二障因緣輪迴不息，受諸逼迫，累業難除，今遇加持真言清淨神力，能護苦報自消。又解：佛頂真言能除三惡，自性無染，如摩尼珠雖處污泥而不受染，所求皆遂成就無疑。又解：內外觀察，心色一如，障體幻空，緣生非有，亦謂聲聞欣寂，外道惡求執有執無各生異見，唯有真言菩薩，智慧善巧建立種種微妙相，用入佛境界，得佛加持，於百千三昧出入無礙，不動不沒入眾生界教化無盡，而其身心不著不礙無有間斷，即於此生滿足佛地，一切障礙皆得清淨也。

In Chinese it means: "Purification of all obstacles." The explanation states: As for "purification of all obstacles," due to the causes and conditions of the two obstacles, beings transmigrate ceaselessly, suffering all oppressions, their accumulated karma difficult to eliminate; now, meeting with the purifying supernatural power of the empowered mantra, it can protect them so that the bitter retributions naturally dissolve. Another explanation: The uṣṇīṣa mantra can eradicate the three evil paths and is of an undefiled self-nature, like a maṇi jewel which, though placed in foul mud, is not stained; whatever is sought is fulfilled, accomplished without doubt. Another explanation: Contemplating inside and outside, mind and form are as one, the substance of obstacles is illusory and empty, and what arises through conditions is not real existence. Furthermore, śrāvakas delight in quiescence, and non-Buddhists seek improperly, clinging to existence or clinging to non-existence, each giving rise to divergent views; only the mantra bodhisattva with skillful wisdom establishes various wondrous marks, enters the Buddha-realm through function, attains the empowerment of the Buddhas, enters and exits hundreds of thousands of samādhis without hindrance, neither stirring nor disappearing, entering the realm of sentient beings to transform them without end, while body and mind are unattached, unobstructed, and without interruption, fulfilling the Buddha-ground in this very life, with all obstacles completely purified.