What to say in exorcisms or to drive away spiritual evils? If you genuinely have the authority, just saying “Go!” is enough words to use. The words are not so necessary. It is the authority that counts. Not everyone has that authority. If you do not have it, no amount of words will work. Jesus said in some cases you might need to pray and fast too. And some evils can never be driven away, such as a thorn in the flesh messenger pf Satan there to keep you from getting conceited. That can be so frustrating. In most cases ‘Go!’, and maybe just adding ‘Lord Jesus Christ’ as an invocation, is enough, if you have the authority.