20 Then the disciples went out and preached everywhere, and the Lord worked with them and confirmed his word by the signs that accompanied it.
“Mark’s Gospel emphasizes Christ’s power as well as his servanthood. Jesus’ life and teaching turn the world upside down. The world sees power as a way to gain control over others. But Jesus, with all authority and power in heaven and earth, chose to serve others. He held children in his arms, healed the sick, washed the disciples’ feet, and died for the sins of the world. Following Jesus means receiving this same power to serve. As believers, we are called to be servants of Christ. As Christ served, so we are to serve.” (Life Application Study Bible 1653)
Life Application Study Bible. Zondervan, 2011. p. 1653.