Someone far away keeps telling the speaker to wait, and the speaker keeps listening. The voice is distant, but it still reaches them, and the repeated "I feel I feel I feel" suggests emotion too big or too tangled to put neatly into words.
What stands out is that the waiting doesn't feel like a burden. The speaker insists it is "not vain" because it points toward a particular moment: meeting again and walking in the rain. The picture is small and intimate. Two people share one umbrella, stand close, and talk in voices so low they seem meant only for each other.
The mood is tender, patient and a little wistful. There is longing here, but also trust. The last line is slightly unclear, since "gain again" could mean regaining closeness or getting back what was lost, but either way the poem ends on hope rather than sadness.