Four short lines carry a surprisingly heavy feeling: helplessness. The speaker hears the breeze whispering someone's secrets, and the poem suggests these are not small or harmless ones. The word "all" in "all of them" hints at how completely the speaker has been let in, as if the wind has hidden nothing.
But knowing doesn't help. The last two lines turn on "Even so," and the speaker admits they could do nothing to save the person addressed as "you." We never learn what the secrets are or what the person needed saving from, and that gap makes the poem feel more haunting. The speaker's guilt or sorrow is clear, even if the details are not.
The mood is quiet, soft and sad. The title "Hushed" fits the whispering breeze and the speaker's own silence. Gentle sounds sit beside a painful truth: sometimes understanding someone comes too late, or simply isn't enough.