• viditvā — knowing
  Gerund of √vid. The guru knew. Gauḍīyas: a true guru's vidyā is partly clairvoyant — he reads the disciple's distress without report.
• sāndīpaniḥ — Sāndīpani
  Proper name. The historical guru of Kṛṣṇa and Balarāma at Avantī (Ujjain). Gauḍīyas note: Kṛṣṇa's own guru is named in the Bhāgavatam by name — the lineage matters, even for the Lord.
• anveṣamāṇaḥ — searching
  Present participle of anu-√iṣ. He searched, actively. Gauḍīyas: this is the guru's mobile compassion — he goes out, he does not wait.
• ācāryaḥ — our teacher
  From ā-√car. Ācārya — one who teaches by his own conduct (ācāra). Distinct from guru as bare authority-figure: the ācārya teaches by walking. Gauḍīyas: Sāndīpani as ācārya walks into the forest — his teaching is the walk.
• āturān — who were distressed
  Same word as v.38 — pinning the distress to the disciples the guru sees. The guru's sight is for the distress, not the credit.

At dawn the guru himself comes searching: not waiting for the disciples to find their way back, but going out into the flood-soaked forest to recover them. Gauḍīyas read this as the inner picture of bhakti — the guru does not stand still; he searches for the disciple who is lost.