The significance of cold water in poetry

It's not the cold water at the bottom of the pool, but the plum blossoms are full of fragrance. It means that only in a cold environment can the fragrance of plum blossom be more prominent and its charm be reflected. "It's not cold water that freezes the bottom, but plum blossoms are fragrant all over the branches" is the expression in a poem. This sentence means that only after experiencing difficulties and setbacks can we cherish what we have more and become more attractive. This poem is meaningful, implying that overcoming difficulties and setbacks is a necessary process, which is closely linked with success.