A reading lens over the Bhagavatam, not a passage of it
Who is a teacher
गुरु
A son teaches his mother, a madman teaches a king, and an ascetic learns from a pigeon, a python and a courtesan.
Where the text shows it
Vyasa's unrest and Narada's story — Skandha 1, adhyayas 4-6 — The man who divided the Vedas and wrote the Mahabharata sits by the Sarasvati unsatisfied, until Narada tells him why.
The four verses given to Brahma — Skandha 2, adhyaya 9 — Brahma, seated on a lotus with no idea how to create, hears 'tapa' twice, does penance, and is given the whole book in four verses.
Kapila teaches his mother — Skandha 3, adhyayas 21-33 — A mother whose husband has gone to the forest asks her own son how to be free, and he answers with Sankhya and devotion.
The allegory of Puranjana — Skandha 4, adhyayas 25-29 — A king finds a city with nine gates, falls in love with its queen, and forgets the friend he left at the door.
Bharata and the fawn — Skandha 5, adhyayas 7-13 — The king the land is named after renounces a kingdom, then loves an orphaned fawn so much that it costs him two more births.
Uddhava in Vraja — the song to the bee — Skandha 10, adhyayas 46-47 — Krishna sends his wisest friend to console the gopis with philosophy, and Uddhava goes home wishing to be a creeper in Vrindavan.
The nine yogis and King Nimi — Skandha 11, adhyayas 2-5 — Nine sages answer nine questions from a king: who a devotee is, what maya is, how to cross it, and what the Lord looks like in each age.
The avadhuta's twenty-four teachers — Skandha 11, adhyayas 7-9 — King Yadu asks a carefree wanderer where his joy comes from, and hears of twenty-four teachers, among them a pigeon and a courtesan.
The Uddhava Gita — Skandha 11, adhyayas 6; 10-29 — Krishna's last and longest teaching, given to a friend who asks only to go with him when he leaves the world.
Who embodies it
Shuka — A sixteen-year-old sage so free of the world that women bathing did not cover themselves — and the one voice that tells the whole book.
Vyasa — He divided the Vedas and wrote the Mahabharata, and still sat by the Sarasvati feeling something was missing.
Narada — A wandering sage with a vina who turns up at every turning point — once a maidservant's son, now the teacher of teachers.
Brahma — The creator himself is a student here: taught by four verses on a lotus, and humbled by a cowherd boy in Vraja.
Devahuti — A princess who served her ascetic husband for years, then asked her own son the question of her life — and was freed by his answer.
Kapila — An avatar born to teach his mother: Sankhya as the Bhagavatam gives it, ending in devotion rather than in analysis.
Bharata — The emperor India is named for, who left his throne, loved a fawn too much, and finished his journey as a silent 'fool'.
Uddhava — Krishna's closest friend and wisest student, sent to teach the gopis and taught by them, then given Krishna's last teaching.