For you know how you ought to imitate us. For we didn't behave ourselves rebelliously among you,
for we behaved not ourselves disorderly among you: The words "behaved" and "disorderly" are from the same Greek word, atakteo, meaning "to be neglectful of duty, to be lawless" (Thayer 83-1-812). Atakteo historically refers to soldiers marching out of order or quitting the ranks. Vine says it: