He had commanded them when with them. This idea includes honest financial transactions, but a good deal more. People outside the churches have a right to watch the conduct of professing Christians in business, domestic life, social life, politics. We do not wish. No advantage in ignorance of itself.
Present tense gives idea of repetition, from time to time fall asleep.
Somehow the Thessalonians had a false notion about the dead in relation to the second coming. Some few pagans clung to this hope, but most had none. Condition of first class, assuming the death and resurrection of Jesus to be true. Literally, through or by means of Jesus. Together with Jesus.