He is looking for preachers who fear nothing but sin. These preachers don't fear man. They don't fear a loss of reputation. They don't fear being forgotten. They don't fear becoming poor. They don't fear violence and they don't fear death. They don't fear Satan but they do fear sin! They hate it and will run from it. For them it is poison. For them it will not destroy them but it will injure them. For them it will bring hurt to the relationship they have with their Master. Like a poison, if not dealt with, it will make them spiritually sick and if untreated could kill them. If they take of this poison they must immediately seek healing and forgiveness and restoration.
But Wesley is looking for preachers who not only fear sin but also those who desire nothing but God.Preachers who don't desire money, who don't desire fame, or power, or influence. God alone is their desire. God alone is their goal. God alone is their first love, their prize, their first thought in the morning and their last thought at night!
Must these preachers be clergy, trained and educated in their own denominational establishment? No, says Wesley - they need only the call of God- plus a fear only of sin and a desire only for God.