And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease.
All Commentaries on Matthew 10:1 Go To Matthew 10
John Chrysostom
AD 407
If the Spirit had not yet been given, since Jesus had not yet been glorified, how then did the disciples cast out the unclean spirits? They did this by his own command, by the Son’s authority. Note the careful timing of their mission. They were not sent out at the beginning of their walk with him. They were not sent out until they had sufficiently benefited by following him daily. It was only after they had seen the dead raised, the sea rebuked, devils expelled, the legs of a paralytic brought to life, sins remitted, lepers cleansed, and had received a sufficient proof of his power both by deeds and words—only then did he send them out. And he did not send them out unprepared to do dangerous deeds, for as yet there was no danger in Palestine. They had only to stand against verbal abuse. However, Jesus still warned them of larger perils to come, preparing them for what was future. The Gospel of Matthew, Homily