Considering the content of the high-interest article, why would the author begin with a quotation by William Wilberforce?

The author begin with a quotation to highlight the story of the passage.

Explanation:

The author considered the theme of the high interest article. After analysing the article, to add more interests to the article the author started it with a quotation. The article will be full of emotions and lovable moments. To express the theme of the story he stated it with quotation by william wilberforce. The author narrated the story very softly. The theme of the story will be very interesting.