“And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;”  
Mark 16:17

From the main verse it gets clear what God thinks about those who believe and become Christians, he says they shall cast out devils; they have no business with devils but to cast them out.
They don’t reason with devils, try to understand the concept of demons, try to get information from devils, they have one response and one response to devils: ‘out!’ or ‘come out of him/her!’
You have been so programmed that the words ‘get out’ from your lips would send any demon fleeing- know this and act accordingly.
Your baby feels sick, your spouse is having job challenges, your mum has been diagnosed with so and so, Jesus thought us, in casting out devils, distance is not a barrier, from any location they can hear you.
If you get that call from home, from where you are cast out that devil at home!
One day satan influenced Peter to rebuke Jesus and Peter noticed how Jesus cast him out:
“But when he had turned about and looked on his disciples, he rebuked Peter, saying, Get thee behind me, satan: for thou savourest not the things that be of God, but the things that be of men.”  Mark 8:33
Same Peter would later give you words from the Spirit:
“…your adversary the devil…walketh about, seeking whom he may devour: Whom resist stedfast in the faith, knowing that the same afflictions are accomplished in your brethren that are in the world.” 1 Peter 5:8-9
He says satan is your adversary and the source of all afflictions Christian face- resist him!
Do the word!