"Lest Satan should get an advantage of us: for we are not ignorant of his devices." 2 Corinthians 2:11
When you look up the word devices in the concordance, it means: a mental perception, thought, the mind, an evil purpose. So when I read this verse I see a two-fold meaning. First, I see that it means we are not ignorant of what goes on in satan's thinking/mind- we aren't ignorant concerning his thoughts toward us. His thoughts are to "kill, steal and destroy" us. Secondly, I see it to mean that the devices he uses against us are attacks against our mind. His main weapon is to play "mind games" with us.
It has been said that the mind is the battlefield. It is against our minds where most of the attacks against us take place. Satan comes against us with accusations- "You are no good; you aren't going to make it, God doesn't care about you; who do you think you are?; etc.". He tries to plant seeds of doubt in our mind- "Did God really say that?; what if God doesn't show up on time?; etc". He brings confusion to our minds in order to make us "wishy-washy" (double minded) in our faith. He tries to make you think that your situation is hopeless and impossible, and too big for God.
Satan has his mind set on destroying you and he does that by coming against your mind/thoughts. But the Lord has provided everything we need to be victorious in the battle. We have been given the helmet of salvation to protect our minds. We have been instructed to capture wayward thoughts and cast them down. We have been told by the Lord what we should be thinking on in order to have victory and peace of mind. If we set our mind on the things that God says instead of what satan says then his devices, plans, purposes and thoughts against us won't prevail.
Have a great day. Satan's thoughts and plans are to destroy you, and he carries out his plans by attacking your thoughts.
For further reading:
2 Corinthians 10:4,5