Since there is no sin in them, there is nothing to latch onto.
The only way that the ego can attack is to attack that which is already less than innocent. You have to somehow believe in ego, which is a belief in attack, in order to be attackable and to create effects of attack in you. If you don't believe this, attack cannot produce effects in you.
You have to have some kind of sin in you in order for it to be able to even conceive of attacking what you "are". If you "are" sin then you're automatically a part of ITS thought system, and therefore ITS attack thoughts can seem to attack what you are.
This is the same as how in Christianity it's taught that the devil cannot attack you unless you have sinned, and that once you sin this gives him "access" and "permission" to come into you and have his wicked way. This is an analogy for the ego.
If you do not step off the innocence pedestal and put some kind of sin into your self, to change your identity from "innocent person" to "sinful person", the ego has absolutely no grounds to access you whatsoever. There is nothing true that it can claim about what you are. You are innocent. You are out of its reach. It cannot even conceive of a way to access you, not through magic or hatred or energy attacks or wars, nothing. Absolutely nothing can touch those who are truly without a belief in being sinful.
So when you choose to believe something that is a part of the ego's thought system, this automatically gives it access. If you believe sin is real, it can attack you. If you believe bodies and worlds are real, it can attack you. And where there is attack, there is the potential for sickness and death.
But if there is no sin in you whatsoever (no real sin), and there is therefore no belief that you are made of guilt (not guilty), and there is no belief that you need be afraid (not a victim), quite LITERALLY, and absolutely, the ego has NOTHING it can do to you.
Its thought system does not apply to you. And the ego is nothing more than a thought system based on illusions. Its illusions do not even TOUCH the innocent. They don't even come close. They simply don't apply, cannot be applied, and have no way to corrupt or reach out and infect the innocent. To do so is TEMPTATION, but it is up to the innocent to not be tempted. And when you, as innocent, are truly convinced of your PERFECT INNOCENCE as given by God, there will be no way to tempt you to believe in sin.
This is what temptation means - to attempt to pull you into the ego thought system where you can be attacked, but not yet having actually accomplished this. It is an "offer" by the ego, which you do not need to listen to.
When you are purely innocent you also do not need a defense of any kind whatsoever. Your innocence IS perfectly protected and beyond the realm of all illusions. Illusions disappear in your presence. You have the authority of God. You also won't have to be constantly putting in effort to be vigilant for the ego's temptations, because once you are FULLY CONVINCED of your innocence and immortality, you will awaken and be permanently safe from all illusions.
This is why nothing real can be threatened, BECAUSE nothing unreal exists. And this is why "a guiltless mind cannot suffer." You ARE immortal!. You just need to stop confusing your identity with that which is mortally untrue of you.
How can innocence sin?
I sit beside the ocean.
The world comes and goes.
Nothing happens to me.