sentences:  The speaker states that his art is "poor but free", "poor" in a sense that it is missing one of the perfect seven rhymes found in typical sonnet structure, but has only six, an imperfect structure missing an important piece, alluding to the mindset of the speaker in his loss of the Fair Youth's affections, directly corresponding to the "mutual render" embodied in the rhyme scheme and the "mutual render" he feels towards his beloved.In effect, the atypical character of the "mutual render" binding the a rhymes of sonnet 125 is a literal testimony of the selfless generosity that the speaker ascribes to the "mutual render” he and his beloved share - "only me for thee".Helen Hennessy Vendler agrees that Shakespeare's variation in verse is a deliberate emphasis on the symbolism and meaning to the speaker's words.