Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.  And he sent them to preach the kingdom of God, and to heal the sick.
 After these things the Lord appointed other seventy also, and sent them two and two before his face into every city and place, whither he himself would come.
The 70 represents those that united in the Lord in His Spirt and His Power.
Jesus called them, equipped them and He sent them.
One who is sent will always get results.
The evidence of being sent is that you get the results that you were sent to do.
 And, lo, a spirit taketh him, and he suddenly crieth out; and it teareth him that he foameth again, and bruising him hardly departeth from him.  And I besought thy disciples to cast him out; and they could not.
 Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.  And I besought thy disciples to cast him out; and they could not.
 And the seventy returned again with joy, saying, Lord, even the devils are subject unto us through thy name.
Live your life being a no-name, and lift up the name of Jesus.
 And John answered and said, Master, we saw one casting out devils in thy name; and we forbad him, because he followeth not with us.  And Jesus said unto him, Forbid him not: for he that is not against us is for us.
 And it came to pass, when the time was come that he should be received up, he stedfastly set his face to go to Jerusalem,  And sent messengers before his face: and they went, and entered into a village of the Samaritans, to make ready for him.  And they did not receive him, because his face was as though he would go to Jerusalem.  And when his disciples James and John saw this , they said, Lord, wilt thou that we command fire to come down from heaven, and consume them, even as Elias did?  But he turned, and rebuked them, and said, Ye know not what manner of spirit ye are of.  For the Son of man is not come to destroy men’s lives, but to save them . And they went to another village.
 Then there arose a reasoning among them, which of them should be greatest.