Be like the bird that, passing on her flight awhile on boughs too slight, feels them give way beneath her, and yet sings, knowing that she hath wings.

Hugo’s image contrasts external supports (“boughs too slight”) with an inner capacity (“wings”). The bird’s song, even as the branch fails, suggests a posture of courage and composure amid instability: one may acknowledge that circumstances, institutions, or relationships can prove unreliable, yet continue forward with confidence grounded in one’s own powers. The line also implies a kind of spiritual or moral resilience—trusting in latent strength rather than in precarious guarantees. In a broader Romantic key, the metaphor celebrates freedom and self-reliance: the self is not defined by what it perches on, but by its ability to rise when what seemed secure gives way.