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Describe how they were doing; use a specific example from scripture.
They were doing very well.
"...brought us the good news of your faith and love and reported that you always remember us kindly and long to see us, as we long to see you"
"for you yourselves have been taught by God to love one another, for that indeed is what you are doing"
"But we urge you, brothers, to do this more and more, and to aspire to live quietly, and to mind your own affairs, and to work with your hands, as we instructed you, so that you may walk properly before outsiders and be dependent on no one."