Mother tongues, as well as second and third languages, are often wracked with linguistic or innate speaking problems. Vega's rhymes are not elaborate - perhaps she wants to call our attention to her own difficulties with language use or those under the influence of mood. She appears to be pointing to the difficulty of finding the right words to express what she wants to say. The problem is a universal one, and she emphasizes it through the use of the first person singular, then later, first person plural. Interestingly, the writer's absence of perfect rhymes, half rhymes, or even assonance portrays the importance of pictures over words.
Liquid is easily movable and clean, much like humans expressing themselves anytime and anywhere.
If silence is the best alternative to which the writer can turn, the world of words must be a disappointing place. Somewhat shockingly, she uses that paradoxical line to make her view known that language is often a clumsy medium for thought transmission, that pure action and silence are suitable replacements. Whether or not the artist would want to admit it, her choice of language allows us to grasp this metaphysical concept.