What is the speaker’s purpose and viewpoint in “acres of diamonds”?

how does the speaker use rhetoric to advance his purpose and his viewpoint? give me some ideas me (: 15

Considered by many to be one of the finest speeches ever written, Acres of Diamonds offers a multitude of lessons about the rewards of work, education, and finding the riches of life in one's own back yard.

In an era when many Americans would pack public halls to hear speeches given by the greatest citizens of their day, Russell Conwell read his world-famous lecture hundreds of times, and used the income he earned delivering it to found a small seminary to train Baptist ministers. That school soon grew into Temple University, one of the first universities to offer affordable education to working-class Americans: it stands today as the most visible example of Russell Conwell's legacy and vision

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oh i didn't know thx for tell me hallelujah

after the moon goes from a full moon it turns into a waning gibbous moon.

here's where my answer came from. i hope this .