Nausha Ameen's poem is about the gap between how people look and what they carry. The speaker notices certain people who talk about happiness with real light in their eyes, even though, as the poem puts it, all they hold inside is pain and heartbreak. The title, "tell me how," sounds like a quiet question aimed at them: how can you do this?
The speaker doesn't sound bitter or suspicious. There is more wonder here than doubt. The second stanza offers a guess rather than an answer, using the word "perhaps": these people might be like flowers that keep growing after a forest fire. The image suggests that damage and life can exist in the same place, and that beauty can come back from ruin. The mood is gentle, reflective and quietly admiring. It leaves us with respect for people who speak of joy not because they haven't been hurt, but in spite of it.