Mantraśodhana, Dīkṣā-krama, Guru-Pādukā, Ajapā-Haṃsa, and Ṣaṭcakra-Kuṇḍalinī Sādhana
हकारः सूर्यसंकाशतेजाः संगच्छते बहिः । सकारस्तादृशश्चैव प्रवेशे ध्यानमीरितम् ॥ ८० ॥
hakāraḥ sūryasaṃkāśatejāḥ saṃgacchate bahiḥ | sakārastādṛśaścaiva praveśe dhyānamīritam || 80 ||
សំឡេង «ហ» (ha) មានតេជៈភ្លឺដូចព្រះអាទិត្យ ហើយចល័តចេញទៅក្រៅ។ សំឡេង «ស» (sa) ក៏មានសភាពដូចគ្នា; វាត្រូវបានប្រកាសថា ជាធ្យាននៅពេលដង្ហើមចូលខាងក្នុង។
Sanatkumara (teaching Narada in a Vedanga/Shiksha context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It links sacred sound (varna) with the two movements of breath—outgoing and incoming—so the practitioner can steady awareness through Shiksha-based contemplation on “ha” and “sa.”
By training attention to remain absorbed during breathing through mantra-sound, the mind becomes fit for sustained remembrance (smarana) and one-pointed devotion, which supports Vishnu-bhakti in practice.
Shiksha (Vedic phonetics): the verse treats specific syllables as meditative supports and ties their recitation/awareness to breath regulation (praveśa and bahiḥ), a technical application of sound and articulation in sadhana.