The Word is mightier than whatever weapon. The call to the ministry must of course come from God himself. But the Lord usually calls by way of means, through men. So, what you are reading now may well be used to prod you into thinking about serving the Lord in the study and proclamation of His Word. You may be asking, what does the ministry actually involve.
Few people have any real idea.
Elders have asked me the same thing. The ministry involves passing on the Word of God, from the pulpit, in the classroom, in the home and on the street. This requires humble and prayerful listening to the Word, for how shall we know what God is saying unless we are prepared to listen ourselves. It also involves listening to people, for how shall we know what part of God's Word we should speak to them unless we know where they are at. What I am saying is, you must be willing to study and you must be willing to get close to people.