31:3 The first epistle to the Corinthian church was written by the apostle Paul during the latter part of his stay at Ephesus. For no others had he felt a deeper interest or put forth more untiring effort than for the believers in Corinth. For a year and a half he had labored among them, pointing them to a crucified and risen Saviour as the only means of salvation, and urging them to rely implicitly on the transforming power of His grace. Before accepting into church fellowship those who made a profession of Christianity, he had been careful to give them special instruction as to the privileges and duties of the Christian believer, and he had earnestly endeavored to help them to be faithful to their baptismal vows.