2 Corinthians 2
Paul writes, in verse 11 that, “no advantage would be taken of us by Satan, for we are not ignorant of his devices”. Is seems he is speaking of a situation about a person who is being over-punished. Paul might have set this punishment in motion via another earlier letter. The Corinthians went about to chastise this fellow. But Paul says in verse 6, “Sufficient for such a one is this punishment which was inflicted by the majority.” It seems they were continuing to do so. Paul is saying ,”enough”. Overdoing it might cause the man to be overwhelmed; now the time has come to forgive and comfort (verse 7).
The Corinthians were doing a good thing in correcting wrong but once the correction was sufficient Satan took over by pushing them to continue the correction. Satan was encouraging something that was good initially to be run past its useful time so that it becomes bad.
We must be careful we do not overextend our righteous activity so that what was good in us (and against Satan) then becomes bad in us (and against God). We should act properly for God's cause. We must be careful that no advantage would be taken of us by Satan, for we are not ignorant of his devices.