We're in a spiritual war, a combat between good and evil, light v. dark, God versus the Devil. So arm yourself for the fight but remember, you're facing demons. This is useful, from St. Benedict:
Crux sacra sit mihi lux
Nunquam draco sit mihi dux
Vade retro Satana
Nunquam suade mihi vana
Sunt mala quae libas.
Ipse venena bibas.
Meaning (my translation):
The holy Cross shall be my light
The dragon shall never lead me
Get thee behind me Satan!
Never tempt me to vanity
You offer wickedness
Drink your own poison.
Of course the Latin is better. Use it, a minor exorcism, but be prepared to draw fire down upon your position if and when you do. I don't say that lightly.
We fight against principalities and powers,
We fight against principalities and powers,
LSP