God gives them the means and the insight to know what to do. Some people are there, to point the way. Some are there because they know what needs to be done. A lot of people have a problem that is designed by the Lord to get to their real problem.
In a way we are prophets and that we are to speak God’s written truth. We are to speak the truth in love regardless of how it is received.
The devil has a big mouth and makes a lot of noise but Jesus has the power and Jesus has the authority which means the devil can’t make you do anything.