Those whom he wanted

“Jesus went up the mountain and summoned those whom he wanted and they came to him. He appointed Twelve, whom he also named Apostles, that they might be with him and he might send them forth to preach and to have authority to drive out demons.” 

Our Lord chose “those whom he wanted,” first of all “that they might be with him.” This is the very first responsibility of His disciples—to be with Him. All others activities are based on this. 

“God was reconciling the world to himself in Christ, and entrusting to us the message of reconciliation.” (Gospel Acclamation)