‘But when Timothy came even now to us from you, and brought us the good news of your faith and love, and that you have good remembrance of us always, longing to see us as we also to see you, for this reason, brothers and sisters, we were comforted over you in all our distress and affliction through your faith.'
The recent arrival of Timothy had come to Paul like a breath of fresh air in the midst of his problems, and especially the news of their faith and love, and of their good memories of him. (It would have been so easy to add ‘hope' here after ‘faith and love', but he did not. This should warn us against assuming too much about Paul's emphasis on the second coming in this letter. His view was balanced and realistic, not overloaded).
‘Your faith and love.' His first rejoicing was in that which demonstrated their growth in the Gospel. That their faith was strong and true, and manifested itself in love. That was all important. His second rejoicing was in the fact of their good remembrance of him and of their desire to see him again. He suffered so much from news of the activities of false teachers and the problems they caused that to learn of those who had not allowed themselves to be affected by such was good news indeed.
Note that Paul is not ashamed to mention the trials he is going through. He wants them to know that they have been a great help to him. The distress and affliction may have been referring to his worries about them, but it is far more likely that it refers to other factors, for while he had not been certain about their state there is no reason to think that lack of news had caused him distress to that extent. Anxiety, yes, but not distress (‘crushing pressures'). So Paul, as often, was going through tough times. His life was one of continual triumph over great tribulation.