What does the Bible say about God's calling of preachers?

In Mark 1:16-20, we see Jesus calling Simon, Andrew, James, and John from their fishing lives to become His disciples and eventually, His preachers. This highlights that God's calling is not based on human qualifications or talents but is a divine selection for specific purposes. The calling involves equipping these men with the necessary gifts for preaching the truth of God's Word. Furthermore, the emphasis is on the sovereignty of God in making such calls, as preachers do not choose their vocation; they are chosen by God Himself.