Jesus entrusts us with the message

"He 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:"  (Mark 3: 13 - 15)

The apostles were the close companions of Jesus who would be with Him all the time and later would be equipped to act like Jesus.

But the apostles were not the only people that were called by Jesus.

"And he gave some as apostles, others as prophets, others as evangelists, others as pastors and teachers, to equip the holy ones for the work of ministry, for building up the body of Christ,"  (Ephesians 4: 11 - 12)

Jesus chose, called and anointed His members to use their gifts in building up of the Church.