Would not their great leader tell them what they ought to believe, and how they ought to live? Paul loved these Thessalonians, and longed to go to them. But he could not leave his work in Corinth. What then was he to do? He could write a long letter to them, bidding them to '_Stand fast in the Lord_.' (1 Thessalonians iii. 8.) To remember that God had called them '_unto Holiness_.' (1 Thessalonians iv. 7.) Paul did not need to remind them to love one another, for that God Himself had taught them. (Verse 9.) He told them, too, not to sorrow hopelessly for those who had died for Christ, for when Christ returns, as He surely will, those who have loved Him shall rise first to meet Him, and so be with Him for evermore. '_Wherefore, comfort one another with these words._' (Verse 18.) We can imagine how eagerly the Thessalonian converts listened to the letter. We see, too, that the first Christian document ever written contained the full Gospel message, and that the heathen had already '_turned to God from idols to serve the living and true God; and to wait for His Son from Heaven, whom He raised from the dead, even Jesus, which delivered us from the wrath to come._' (1 Thessalonians i. 9, 10.) A few months later the Thessalonians were once more in great perplexity. 'What are we to believe?' they had asked. 'Paul tells us plainly that Christ will return to the earth. How can we settle down to our ordinary work with such a wonderful hope before us?' From the answer which the Apostle sent to their questions--which we call to-day the Second Epistle to the Thessalonians--we can see clearly how troubled they must have been. In order to understand their position we must remember that the words and acts of the Lord Jesus Christ had not as yet been written down, and all that the Thessalonians knew about Him was from Paul's preaching and teaching. They could not turn to their Bibles as you can when you long to know just what the Saviour would have you do. So Paul wrote to them again, explaining that they must wait in patience, quietly doing their daily work, and earning their own bread, as he and his companions had done whilst living in Thessalonica. (2 Thessalonians iii. 12.) Most of St. Paul's Epistles--that is, his letters--were written in this way because of some special need or danger. The converts in Corinth, Galatia, or Ephesus, were in difficulty, or in danger of losing their faith in Christ, and Paul, ever watchful, but unable to go to them at the moment, wrote the message of comfort and warning which God had put into His heart. At last there came a time when Paul could visit his converts no more. The Roman rulers were as yet not angry with the followers of Christ. They simply despised them, and thought the Jews very foolish to trouble about a pack of low, ignorant people. 'They are mostly slaves or such like whose opinions are worth nothing. Why do they not let them alone as we do?' said the proud Romans.