# the abundance of their joy and the extremity of their poverty ... riches of generosity

"because of the people's great joy and extreme poverty, they have become very generous" 

# extremity of their poverty ... riches of generosity

Paul sends Titus and two other believers to Corinth to encourage the Corinthians to give generously. Paul and the others will carry the money to Jerusalem. 

# great riches of generosity

"a very great generosity."