"The Epistles in the New Testament have all of them a particular reference to the condition and usages of the Christian world at the time they were written"

This quote by Joseph Butler is referring to the Epistles in the New Testament, which are letters written by the apostles to the early Christian churches. Butler is suggesting that these letters were composed with a specific function in mind, to attend to the particular requirements and concerns of the Christian world at the time they were composed. He is indicating that the Epistles were composed to supply guidance and direction to the early Christians, and to assist them comprehend the teachings of Jesus and how to live according to his mentors. Butler is also suggesting that the Epistles are still pertinent today, as they provide insight into the beliefs and practices of the early Christian church. By studying the Epistles, we can acquire a better understanding of the Christian faith and how it has actually progressed in time.