The song is a woman's self-portrait delivered as a love letter, and the first passage is the portrait's frame. Udne laga kyun man bawla re: why has my mad heart started flying. The heart was not flying before, which is the whole biography in one line. Aaya kahan se yeh hosla re: where did this courage come from. The two questions are the song's opening move, and the rest of it is the answer: the courage came from him.
The second passage does the song's strangest work. The wind is weaving, taana-baana, the warp and weft of the loom, and the wind's weaving is a world being made. But the drops do not come, boondein bhi toh aayen nahin baaz yahan: even the rain refuses this place again. And then the song's great line: saazish mein shaamil saara jahan hai. The whole world is in the conspiracy. The word is saazish, a plot, and the song is saying the entire world has conspired against this love. Every particle of it, the song adds, is a plea, har zarre-zarre ki yeh iltija hai. The universe is both the enemy and the petitioner.
The third passage is the oath. The eyes speak, and the world speaks the heart's language, dil ki zuban. Love asks for, love wants, a storm. Then the two lines that the whole song is built on: chalna aahiste, ishq naya hai. Walk slowly, this love is new. And: pehla yeh vaada humne kiya hai. This first promise we have made. The woman who has walked on coals is asking the one man to walk slowly with her, and the tenderness of the request is the whole character of the song.
The last passage is the history, and it is the passage that makes the song belong to the film. Nange pairon pe angaaron chalti rahi: barefoot, on coals, I kept walking. The image is the film's central portrait of its heroine, and the line that follows deepens it: lagta hai ke ghairon mein palti rahi. It feels as though I grew up among strangers. Then the request that the whole song has been moving toward: le chal wahan jo mulk tera hai. Take me to the country that is yours. And the reason: jaahil zamana dushman mera hai. This ignorant world is my enemy. The song ends with the woman naming her whole life in one sentence, and asking to be taken out of it.
Rahat Fateh Ali Khan's voice carries the passage from coals to country without a break, and Salim and Sulaiman's arrangement gives the song the scale of a qawwali without making it one. The film was Madhuri Dixit's return, and the song was the return's anthem.