Attack actually means withdrawal. The Kingdom of God cannot be attacked. When you try to attack, you withdraw away from what you are attacking.
It's funny how all of the ego's illusions always look like one thing but are actually totally the opposite.
In the ego, free will looks like being tremendously independent and having great breadth of choice, but in truth the ego's free will is actually an imprisoned will and all its choices are attempts to isolate and be limited. The ego is the imprisoner of will.
When you attempt to attack a brother, you withdraw away from him and isolate. Therefore your attack cannot access the reality of what He is. Only in sharing of love can you actually "connect" with your brother's real self, because his real self is made of love and can only be accessed through love.
It's the same with God. If you try to attack God or oppose His will, instead of actually being ABLE to cause some kind of change in him, you instead withdraw away from him. It seems to be experienced by you as if it's a positive outward expression of attack away from yourself, but in truth it is a withdrawal away from the perceived enemy and a failure to attack at all.
Attack cannot have any real effects. You cannot really sin. You cannot attack anything real. Nothing real can be threatened. This is why God and His Kingdom are totally beyond the reach of the ego.
Similarly with power, when you are empowered you automatically must be aligned with love because love is strength and only by being aligned with love can you access the Power of God. If you try to use God's power to attack, you automatically lose that power and become weak.
In the ego, whenever there is an attack trying to be perpetrated, it is in fact a lack of attack. It is a failure to cause. It is an attempt to stop causing. It is the opposite of causal power. It's like a fearful dog barking its head off in hopes that the threat will go away, making it look like it is attacking when in fact it is terrified and will run away at the slightest advance.
This means literally you literally CANNOT ATTACK ANYTHING REAL. You cannot attack your brother, you cannot attack God, and you cannot attack yourself. This is why your innocence is guaranteed. Any time you try to attack you automatically place yourself under arrest. When you try to attack, you arrest the extension of your mind, which produces sickness. When you attack, you create illusions of being hurt.
When you try to attack your brother, you arrest your mind and attack yourself. This causes you to withdraw away from your brother into your body. It makes you isolate yourself and identify yourself with a physical form in a specific location in space. You are supposed to be everywhere in your omnipresence but attack puts you in prison. You imprison yourself by not loving yourself and others.
Joining minds with others through expressions of love (miracles) heals the separation, releases you from prison, ceases attack and allows you to gain access to sharing with others again and with God. Only through love can you connect with loving brothers. Attack is a breakdown in communication and it attacks communication itself, causing the attacking effort itself to be attacked. This is because all ego efforts to attack are self attack.
God is absolutely protected from the ego and all its ways. It cannot even approach God because its attempts to approach are actually running away. Every time it lurches forward with a spear, it recoils in terror. Nothing real can be threatened because the ego can only attack the ego and reality does not attack reality. Nothing unreal can threaten anything real, and nothing unreal exists.