How do we know that God calls certain men to preach?

The sermon outlines that God does not indiscriminately send men to preach; rather, He calls them specifically for His purposes. This divine calling is evidenced by the transformation and empowerment they experience when proclaiming the gospel. The examples of Peter and Paul illustrate this point: they were prepared for their specific tasks by God alone. Effective preaching occurs when God sovereignly ordains a preacher's ministry, accomplishing His will through them. The validation of a preacher's calling is found in the fruit produced in the lives of those who hear the Word, as they come to faith in Christ.