I have set you an example that you should do as I have done for you. I tell you the truth, no servant is greater than his master, nor is a messenger greater than the one who sent him. Now that you know these things, you will be blessed if you do them.
Jesus has set a clear example of how we should treat others. Even though he was betrayed but every single one of his friends he still humbled himself to the lowest position and washed their feet because he loved them unconditionally. If that's not a perfect image of how we ought to act towards the people of this world that I don't know what is.