Two gems from Frege’s essay “On Sense and Nominatum” -  

On poetry: “Among the differences possible in this connection [the individual’s image] we mention the shadings and colorings which poetry seeks to impart to the senses. These shadings and colorings are not objective. Every listener or reader has to add to them in accordance with the hints of the poet or speaker. Surely, art would be impossible without some kinship among human imageries; but just how far those intentions of the poet are realized can never exactly be ascertained.”

On sense: “In listening to an epic poem, we are fascinated by the euphony of the language and also by the sense of the sentences and by the images and emotions evoked. In turning to the question of truth we disregard the artistic appreciation and pursue scientific considerations. Whether the name ‘Odysseus’ has a nominatum is therefore immaterial to us as long as we accept the poem as a work of art. Therefore it is the striving of truth which urges us to penetrate beyond the sense to the nominatum.”