[This letter is from] Paul, and Silvanus and Timothy, [and is being sent] to the church of the Thessalonians [Note: This was a town in present-day northeastern Greece] in [fellowship with] God, the Father and the Lord Jesus Christ. May God's unearned favor and peace be upon you.

So, when we could not stand it any longer [Note: Paul's concern for the spiritual well-being of the Thessalonian Christians became unbearable], we [i.e., I, See verse 5] thought it best to be left behind, alone, at Athens [Note: Paul was willing to labor alone at Athens, so he could send his fellow-workers to minister to others. See Acts 17],

and so we [i.e., I] sent Timothy, our brother and God's fellow-worker in [the ministry of] the Gospel, to strengthen and encourage you in your faith,

[So], for this reason, when I could not stand it any longer, I also sent [Timothy] to find out about your faith. I was afraid that somehow the tempter [i.e., Satan] had tempted you [to give up] and that our work [on your behalf] will have become useless.