Part of being harmless is humility.
Luke 9 summary: 46 commendeth humilitie: 51 biddeth them to shew mildnesse towards all, without desire of reuenge. 57 (Luke 9:46-56 [KJV])  Then there arose a reasoning among them, which of them should be greatest.  And Jesus, perceiving the thought of their heart, took a child, and set him by him,  And said unto them, Whosoever shall receive this child in my name receiveth me: and whosoever shall receive me receiveth him that sent me: for he that is least among you all, the same shall be great.  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.
Ye know not what spirit you are of because he has not come to destroy mans life .
It doesnt really say we should serve people but rather that we should be the least. Consider this as a steward of Jesus Christ.
We should be the least, receive a child , we should not forbid people . Not hurt people , not destroy but save.
This doesn't work with church people. Because they have perfected the way to abuse christians. You are basically in sin when you talk to them. Because they think that they should be your pastor you know so they decide. They are like the pharisees. They dont have any regard for anything. Its just them and that they are in charge over you. So this only works when you are not dealing with church people. When you are not in church really. Because outside of church they dont have the same authority.