Summary: never take for granted the victory over sin that Christ has won for us. Never underestimate the devil. He’ll oppose us at every opportunity. Never give up in the fight against sin and evil. But always remember the power of God and the armour with which he
Do you remember when we looked at Paul’s prayer in Eph 3 that I commented how difficult it is to achieve the sort of unity that God wants from his church. In fact I pointed out that that’s why Paul prays the way he does: because only by God’s power can this miracle come about. Paul knows that apart from the problem of our own weakness, our hardness of heart, there are forces in the world that’ll try everything they can to stop us showing God’s wisdom and glory to the world. The reality of life for the Christian is that we face opposition from the spiritual forces around us every day. We have an enemy whose sole aim is to ruin our efforts at every point. So Paul warns us. He says "our struggle is not against enemies of blood and flesh, but against the rulers, against the authorities, against the cosmic powers of this present darkness, against the spiritual forces of evil in the heavenly places."
So what do these spiritual forces want to do? They want to thwart God’s plans. Is God’s plan to create a new society? They’ll do their best to break it down. Has God, through the death of Christ, broken down the dividing wall of hostility between Jew and Gentile, indeed between all people, independent of gender, race, or culture? Then the devil and his agents will try to build that wall again. Does God intend his new people to live together in harmony and purity? Then the powers of evil will sow the seeds of discord and sin in our midst. We must never underestimate the danger. Never take for granted the victory over sin. Never stop fighting temptation. Never give up in our efforts to overcome it. And never be surprised when you see a Christian leader fall into sin of some sort or another. Until Christ returns to take us to the Father we’ll always be fighting these spiritual battles. The peace, which Christ has bought by his blood, is still a promised peace. It’s a peace that we enjoy in the midst of a relentless struggle against evil. The war is won but the battles continue.
So never underestimate the devil. Paul describes him and his followers as powerful, evil and cunning. They’re the rulers and authorities, the cosmic powers of this present darkness. Until Christ returns they continue to wield their power. Christ has won the victory but they continue to fight, and will continue to do so with more and more desperation, until the last day. And make no mistake, their intentions are evil. They’re the spiritual forces of evil in the heavenly places. We’re opposed by spiritual forces whose desire is to conquer us and to rule us, to lead us astray from following Christ.
Notice too that the devil is a wily opponent. That is, he combines tactical shrewdness with ingenious deception. Jesus called the devil the "Father of lies" (Jn 8:44). He’s described as a wolf in sheep’s clothing. He even disguises himself as an angel of light (2 Cor 11:14). If he finds one strategy isn’t working he’ll try another. And of course one of his great strategies in this day and age is to convince people that he doesn’t exist. People don’t talk about the devil any more do they, except as a joke. "Oh, the devil made me do it!" But do you see that that’s one of his great successes. If you don’t believe in the devil, you won’t be worried about his lies and temptations. If he’s just a children’s fable we can forget him because we’ve outgrown that sort of childishness. But don’t be fooled. The devil is real. His opposition is something to be reckoned with. What we’re fighting against isn’t just human weakness. Psychological counselling and self help groups may solve some problems, but they won’t help with this one!