Does compound sentence need three sentences in a row?

Yes, at least three sentences, such as

To choose fraternity is to choose to cherish feelings.

To choose fraternity is to choose persistence in everything.

To choose fraternity is to choose lofty life aspirations.

Don't give up hope, hope makes people face up to difficulties and failures. Difficulties and failures are not terrible. The terrible thing is that a person loses the hope and courage to fight against them. Qu Yuan is patriotic, "seeking up and down"; Once the state of Chu perished, it lost hope, leaving only the desperate road of jumping into the Miluo River.

Don't give up hope, hope to make people look forward to a bright future. With hope, there will be yearning for the future and the pursuit of a better life. Heine, a German poet, wrote emotionally in a poem: "Everything plundered in winter will be returned to you in the new year."

Don't give up hope, hope will increase people's motivation. At all times and in all countries, how many people with lofty ideals have made unremitting efforts to realize their ideals. Beethoven, who was blind and deaf in both ears, uttered the heroic words of "I want to seize the throat of fate" and wrote the immortal "hero" movement.