Introduction to 1 Timothy

The design of the epistle appears to be, that Timothy having been left at Ephesus, St. Paul wrote to instruct him in the choice of proper officers in the church, as well as in the exercise of a regular ministry. Also, to caution against the influence of false teachers, who by subtle distinctions and endless disputes, corrupted the purity and simplicity of the gospel. He presses upon him constant regard to the greatest diligence, faithfulness, and zeal. These subjects occupy the first four chapters; the fifth chapter instructs respecting particular classes; in the latter part, controversies and disputes are condemned, the love of money blamed, and the rich exhorted to good works.

-- taken from Matthew Henry's Concise Commentary