He was a Greek playwright who lived in the 4th century BC. He wrote over 100 comedies, but only a few have survived to this day. The quote "While there's life, there's hope" is often attributed to him, although it's unclear if he actually said it or if it was a common saying in his time.
The sentiment of the quote is certainly something that resonates with many people, even today. It expresses the idea that as long as we are alive, there is always the potential for something good to happen.