Here, Jesus even calls himself a SERVANT, a SLAVE!
John 13:15- For I have given you an example, that you also should do as I have done to you.
16- Truly, truly, I say to you, a servant [Grk also reads a "slave"] is not greater than his master; nor is he who is sent greater than He who sent him.
17- If you know these things, blessed are you if you do them.
God a SLAVE, a SERVANT?