There are two mistakes we often make when it comes to the devil. One is the make too much of our foe and attribute almost deity status to him. The devil is not omnipotent (all powerful), omniscient (all wise, all knowing) or omnipresent (everywhere present); so if he is bothering you, he cannot possibly be bothering me at the same time (though he does have many agents under his rule who work on his behalf). The other mistake though is to make too little of him, and not take his schemes against us seriously.
In the famous passage in Ephesians 6 which portrays the saints' spiritual warfare, notice two things. Firstly, the Apostle Paul likens the conflict to wrestling, which is the closest form of fighting. The original words could be translated "our wrestling match is not against persons with bodies..."
Secondly, although Paul could have used the word "against" just once to have easily made his point, he uses it over and over again - five times in all - illustrating the immensity and intensity of the battle each of us are engaged in. Like it or not, we are in a war.
â€œ10 Finally, be strong in the Lord and in the strength of his might. 11 Put on the whole armor of God, that you may be able to stand against the schemes of the devil. 12 For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places. 13 Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand firm.
Below is a short video of quotes by Dr. Martyn Lloyd Jones. Very sobering. - JS