Many are the believers that are like John Mark ... going along on the mission to tell others the Word and message of Jesus Christ, and then along the way, John Mark decides to go home, and leave Paul and Barnabas and Silas. No incite as to why, what was his reason for leaving them ... weary?, loss of jest? ... it would seem Paul alone would be the best teacher of all, so being along was an honor, the best way to learn, and know the message and how to tell it to the people.
Oh LORD let us not be like John Mark. Later on He was willing to join Barnabas and Paul, but Paul said NO! Opportunity there lost by John Mark's previous decision.
Missed blessings, indeed. Forgive us LORD for our times of weak faith, in Jesus name, Amen.