God is omniscient, which means that He is all-knowing. God is omnipotent, which means that He is all-powerful. And God is omnipresent, which means that He is present everywhere.
In sharp and direct contrast to this, the devil does not reflect God's divine attributes. He is not omnipotent. Although he has great power, his power is clearly limited, and he is nowhere near to being God's equal. Nor is the devil omniscient. He knows many things, but he doesn't know all things. And, he is not omnipresent. He can only be in one place at one time.
What the devil doesn't want you to know is that he can do nothing in the life of a Christian without God's permission. The devil complained that God had put a wall of protection around Job (see Job 1:10). So we see from this that even though Satan has a wicked agenda, he has to ask permission to touch the child of God. There is an impenetrable wall that God has placed around you that Satan cannot breach. That doesn't mean you can't be tempted. It doesn't mean you can't be harassed. It doesn't mean you can't be attacked. But God never will give you more than you can handle. So when the devil comes knocking at your door, I would suggest that you say, "Jesus, would You mind getting that?" I am so glad He is there, because I am no match for the devil. And neither are you.
Temptation will come into your life. Jesus even taught us to pray, "And don't let us yield to temptation, but rescue us from the evil one" (Matthew 6:13). So the next time you are facing temptation, remember that God never will give you too much. He will provide a way out.