उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
कुर्वन्त्यनुग्रहं तुष्टा गुरौ तुष्टे न संशयः कर्मणा मनसा वाचा गुरोः क्रोधं न कारयेत्
kurvantyanugrahaṃ tuṣṭā gurau tuṣṭe na saṃśayaḥ karmaṇā manasā vācā guroḥ krodhaṃ na kārayet
إذا رضي الغورو فإنّ الشيوخ والأخيار، وقد امتلأت قلوبهم رضًا، يمنحون النعمة—ولا شكّ في ذلك. لذلك، بالفعل وبالفكر وبالكلام، لا ينبغي أبدًا أن يُستثار غضب الغورو.
Suta Goswami (narrating to the sages of Naimisharanya; general śāstra-instruction on guru-sevā within Śaiva discipline)
It establishes guru-sevā as the prerequisite for Śiva’s anugraha: without pleasing the Guru, the fruit of liṅga-pūjā and mantra practice is obstructed by lack of right discipline.
Śiva as Pati is approached through anugraha (grace); the Guru functions as the channel of that grace, guiding the paśu (soul) out of pāśa (bondage) by right conduct in thought, word, and deed.
Pāśupata-style sādhana of tri-karaṇa-śuddhi—purifying action, mind, and speech—especially expressed as restraint and humility toward the Guru to avoid aparādha (offense).