The first hemistich names an inner emotion, but the second supplies the concrete sight of a swiftly moving she-camel. This contrast gives the verse its effect: worry gathers inwardly, while the journey breaks physical stillness.
The verse does not logically promise that every grief disappears. It portrays travel as the poet’s familiar response when anxiety approaches. The camel’s speed therefore has a psychological function as well as a physical one: emotion, movement, and the desert landscape become linked.