lifesabreez
Ask him by WHOSE authority he comes. There are three kinds of beings. Disembodied earth dwellers who don't go into the Light, demons...that's what I said, and beings from the Light.
It's extremelely important you find out because the bad ones are...think of Dracula. Spiritual (legal) Law dictates they need an entrance through into your life. They can deceive you into believing they are not who they say they are, if they're bad and once you say *yes* you can be setting yourself up.
It's easy ask them. There was a woman a long time ago who was doing transcendental meditation and Jesus appeared to her. She got used to the visits thinking she was blessed and special until for some reason she asked him who are you. He said I'm Jesus. When she asked him if was the Jesus of the Bible, his white robe, beard and long hair turned into an old guy with a plaid shirt who looked like he lived on a farm and he was very angry!
Prayer is very powerful and can be felt on the other side by all beings both evil and angelic because it is a Universal language which needs no words since they're vibrations.
When an individual surrounds themselves with prayer, good deeds and light, it's much more difficult to penetrate the spiritual membrane you put around you.
You can command them in the name of God to leave and they have to!
Hope this helps. : )
LB