Before a painting"" How does the sonnet structure of this poem contribute to the overall meaning

The structure of the sonnet reinforces the idea that art influences feelings, even without the observer technically analyzing it.

Explanation:

The central theme of the poem is how art should be admired and its power to express the feelings of those who visualize it. The poet reinforces that for these feelings to be felt, the observed does not need to understand the artist's techniques or concepts. This can be perceived because in the first stanza of the sonnet, the poet shows that she does not need to know the name of the artist, nor the devices he used in art, in the second stanza, he shows that art itself is the only element capable of convey sensations.

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.