In ACIM the idea of evil is defined as 'ego', more or less. Not just individual egos but also a collective one.

The ego uses temptation to distract you from the truth. It is capable of creating scenarios in which it seems like you want and enjoy things which you would normally not want or enjoy.

It is also very cunning in that it can use your very own weaknesses against you. If you think that some person or project or activity might be 'the answer' and that it will save you, even though it's not true, the ego will encourage you to pursue it. And it knows you are likely going to go along with it because you yourself are the one who is believing it will work, or is what you want.

I have only recently discovered that my own ego has been 'playing me', using my own self deceptions to lure me away from the truth. It's particularly bad if I am very mistaken about something, like I think I'm onto some kind of solution or really great thing, but really it's another ego bullshit wild goose chase which will have me 'seek and do not find' for a long time.

In other words, if I choose to believe in an illusion and I give it faith and am convinced of its supposed value, this becomes a blind spot in my awareness. My ego comes along and says "why don't you do that thing, you know you want to, you know you like it, you know how appealing it is". And then I'll be all gooey eyed with hypnotic spirals spinning in my eyeballs while I salivate over this very appealing, attractive opportunity. All the while, my mind is completely distracted from God.

Notice though that the ego thus really has no power of its own. It can only use the things I have agreed to as a way to tempt me away from the truth. If it weren't for me getting gooey eyed over some new piece of technology or some amazing movie or some pathway that seemed really enticing, the ego would have no way to deceive me. I have deceived myself, willingly, and that is all the ego needs.

It can trigger off a memory of these tempting offers just at the right moment, knowing that their allure will particularly hurl my awareness off in a different direction, like some rat in a maze that just caught a glimpse of a big chunk of delicious cheese. Suddenly all my senses are ignited and the unfinished business I have with this 'promising savior' has captivated/captured my attention. I fall for my own traps.

It's good to be aware the ego is actively tempting us in this way, using our own mistakes against us, and trying to get us to reinvest in anything other that what we really are. There is nothing guilty or bad or wrong with enjoying life, but if we are psychologically using it as a false savior, then we will fall for temptation - the temptation to believe the truth is not true and God does not deserve our attention.

Watch out ... for yourself :-) You are the one who gives the ego the fuel it needs, and you thus hire it to serve your false interests. It is merely a reflection of your own self deception. It is not against you but for you. You want it. But you need to want God instead.

Here is Jesus talking about how as you enter the real world (not heaven), the physical world is now seen as SHADOWS, which SEEMED SOLID, which now appear TRANSPARENT AND FAINT, at times FORGOT.

"Christ's vision is the bridge between the worlds. And in its power can you safely trust to carry you from this world into one made holy by forgiveness. ****Things which seem quite solid here are merely shadows there; transparent, faintly seen, at times forgot, and never able to obscure the light that shines beyond them.**** Holiness has been restored to vision, and the blind can see."

And he goes on elsewhere to speak of how the body is diminisihed in your sight...

"Across the bridge it is so different! For a time the body is still seen, but not exclusively, as it is seen here. The little spark that holds the Great Rays within it is also visible, and this spark cannot be limited long to littleness. Once you have crossed the bridge, ****the value of the body is so diminished in your sight**** that you will see no need at all to magnify it."

And again, the world is regarded as nothing but a thin veil, an illusion of smoke and mirrors, hanging before the face of christ, which can be easily brushed aside.

"The world stands like a block before Christ's face. But true perception looks on it as ****nothing more than just a fragile veil, so easily dispelled that it can last no longer than an instant.**** It is seen at last for only what it is. And ****now it cannot fail to disappear,**** for now there is an empty place made clean and ready. Where destruction was perceived the face of Christ appears, and in that instant ****is the world forgot****, with time forever ended as ****the world spins into nothingness from where it came.****" The body becomes a shadow, circling around the good, no longer obscuring sight of the real world.

"By focusing upon the good in him, ***the body grows decreasingly persistent in your sight***, and will at length be seen as ***little more than just a shadow circling round the good.*** And this will be your concept of yourself, when you have reached the world beyond the sight your eyes alone can offer you to see. For you will not interpret what you see without the Aid that God has given you. And in His sight there is another world."

And the veil is brushed aside...

"The fourth obstacle to be surmounted (fear of death) hangs like a heavy veil before the face of Christ. Yet as His face rises beyond it, shining with joy because He is in His Father's Love, ****peace will lightly brush the veil aside**** and run to meet Him, and to join with Him at last. For this dark veil, which seems to make the face of Christ Himself like to a leper's, and the bright Rays of His Father's Love that light His face with glory appear as streams of blood, fades in the blazing light beyond it when the fear of death is gone."

nb: "The world is a picture of the crucifixion of God's Son" Attracted by what is beyond the veil... YOU WILL LEAVE THE WORLD FOREVER!

"It seems to you the world will utterly abandon you if you but raise your eyes. ****Yet all that will occur is you will leave the world forever.**** This is the re-establishment of your will. Look upon it, open-eyed, and you will nevermore believe that you are at the mercy of things beyond you, forces you cannot control, and thoughts that come to you against your will. It is your will to look on this. No mad desire, no trivial impulse to forget again, no stab of fear nor the cold sweat of seeming death can stand against your will. For what attracts you from beyond the veil is also deep within you, unseparated from it and completely one."