The Device of Unforgiveness

While reading 2 Corinthians 2:10, 11, I saw something about unforgiveness that I hadn’t seen before. It reads,

‘Now whom you forgive anything, I also forgive. For if indeed I have forgiven anything, I have forgiven that one for your sakes in the presence of Christ, lest Satan should take advantage of us; for we are not ignorant of his devices.’

Notice verse 11 says, ‘lest Satan should take advantage of us…’ How would he be able to do so? It’s simple, through unforgiveness. According to this verse, Satan uses unforgiveness like a device.