Tagore famously said the meaning of flowers. Flowers make the air full of fragrance, but its ultimate task is to dedicate itself to you.
Tagore didn't study it, and this sentence has no context. I don't know if it is a love poem expressing my love for my lover. If so, then the author compares himself to a flower, which means that my coming into this world will bring benefits to others, but the greatest significance of my existence is that I can belong to you completely and be with you.