Be self-controlled and vigilant always, for your enemy the devil is always about, prowling like a lion roaring for its prey. Resist him, standing firm in your faith and remember that the strain is the same for all your fellow-Christians in other parts of the world. (JBP)
The writer C.S. Lewis once said that we can make two equal and opposite errors when it comes to the evil one. We can be dismissive of him, either because we think he is a childish myth or because we think followers of Jesus have some sort of automatic protection against him.
The other error is to focus on him, giving him too much attention. We can become obsessed with the occult, or from a Christian perspective, see his activity everywhere and spy demons around every corner and lurking in every bit of human pain.
The Scriptures avoid these extremes. We recognise his reality and the danger of it. But we also recognise we are given power to resist and that we are ultimately on the winning side. Satan may roam widely but he is still on a long leash.
We best resist by keeping whatever company we can with fellow believers. Lions pick off their prey by seizing the isolated ones. We remember that we are not alone in being threatened and tempted. Being tempted does not make us sub-standard Christians, it just means we are human.
We must not ignore the threat; we must not magnify the threat. We must not assume victory without struggle; we must not resign ourselves to defeat. We are to be always alert, but never alarmed.