[And] we were not looking for honor from people, either from you or from anyone else, even though, as apostles of Christ, we could have become a burden [to you]. [Note: The idea seems to be that the apostles could have claimed financial support, but chose not to].

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],

[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.

for now we [really] live, if you [continue to] stand firm in [the service of] the Lord [i.e., Paul could enjoy life much more in knowing that the Thessalonians were living for the Lord faithfully].

who died for us, so that whether we are awake or asleep [i.e., alive or dead], we could live together with Him.