God asked Satan if he considered His servant Job. The word “considered” was a Hebrew military term meaning “to study the objective to find its strengths and weaknesses”. In this case, Job was the objective.
Satan is not Omnipresent. He can’t be in two places at once. He is not omniscient. He doesn’t know everything there is to know. He is not Omnipotent. His power is limited to the power that God allows him to have.
Satan makes it his business to know as much about the children of God as he can. As children of God, we shouldn’t fear Satan or try to hide from him. James 4:7 tells us that we should submit to God, resist the devil and he will flee from us. We resist…he flees.
Later in the book, Satan tells God that Job only serves Him because He has blessed Job greatly, and He keeps a hedge of protection around him. God gives Satan permission to strike all that Job has, but not to touch Job. This is important. Satan needed permission to touch a child of God. Have no fear. He who is in us is greater than he who is in the world!