I’ve been reading and re-reading Mark 3:13-19 in which Jesus appoints the Twelve “that they might be with him and that he might send them out to preach and to have authority to drive out demons.”
I recall wandering through an airport bookstore and flipping through a book titled something like “Leadership Lessons from Jesus.” One of the “lessons” was that Jesus was a great team-builder. Just look at the team he put together! He was the model CEO! You, too, should look out for people who are effective and take initiative! Like Jesus!
As Mark’s narrative proceeds, the team is a near-disaster. In listing their names, and taking the whole context of the Gospel into account, Mark hints at their fragility. There’s Simon, the violent revolutionary; Peter, who denied him; Thomas, who doubted him; and Judas, who betrayed him.
Mark is indeed a mysterious Gospel, and Jesus’ “calling” and “wanting” (v. 13) these people is surely an instance of God’s mysterious grace rather than the disciples’ effectiveness.