• sugrīva-ādyaiḥ — named Sugrīva and others
  Kṛṣṇa's four horses — Śaibya, Sugrīva, Meghapuṣpa, Balāhaka — are named in SB 10.59. Bhagavān has personal relationships even with His horses; nothing in His establishment is generic.
• syandanam — chariot
  Syandana literally 'one that flows' — the chariot is the mobile throne. In Bhagavad-gītā the chariot is Arjuna's; here it is His own. The same Pārthasārathi who drove for the bhakta now mounts His own chariot to hold court.
• praṇamya — having bowed down
  Even the charioteer's first act is praṇāma. In the Vaiṣṇava household, every encounter with Bhagavān begins with bowing, however many times a day. The body is the first organ of bhakti.
• sūtaḥ — the chariot driver
  Sūta is also a bardic caste — the chariot driver historically composed the king's praise-songs. The same office that fights and drives also sings. Service has many faces, but one rasa.

• Where could my preparation for service be quieter, more thorough?
• How does the simple bow before action shape what follows?

The chariot Sugrīva yoked and ready at the door is like the breath the devotee finds already drawn in at the moment of japa — Bhagavān's service-instruments arrive before they are asked for. The bowing charioteer Dāruka has already made his offering before any command.