What are 3 kinds of good things categorized by Glaucon?
The first would be that the happiness of the community lies in skills- specific education, each social class would focus on what they do well. By concentrating on the area they excel in, they will be content with their place in society.
Secondly, democracy is sub-par in leading the people. Philosophers would be the best to lead the state-they are able to see truth in all situations.
The idea of leading a "just" life will lead to benefits both now and in the afterlife. Striving to live purely will be rewarded by god, whereas those who commit wrongdoings will repeat their sins in the afterlife.