Luke 9:49 “Now John answered and said, “Master, we saw someone casting out demons in Your name, and we forbade him because he does not follow with us.”
In context they had just been talking about who was great. So, this conversation followed naturally. The disciples may have thought that at the very least they would be considered greater than others who did not follow Christ as they did. However, not all who followed Him were selected to be one of the twelve.
Heavenly Father, thank You for using people from all over the world to minister for You. Thank You for reaching to the least of us! In the Name of the Lord Jesus Christ I pray and praise You, Amen.