I Corinthians 1:26-31
Every Christian is called to "salvation and service." While those individuals who are called to the vocational ministry have a special call, a Christian fireman, educator, or sales clerk have all also been called and should work as unto the Lord.
1. Consider God's chosen People - v. 26 also referenced I Samuel 16:7
2. Consider God's chosen Plan - v. 27-28
3. Consider God's chosen Purpose - v. 29-31
also referenced Romans 4:5, 2 Corinthians 5:21, Jeremiah 9:23-24
God likes to take ordinary People, and do extraordinary things through them (Plan), so He gets all the glory (Purpose)!