Washing of the Feet

If I then, your Lord and Master, have washed your feet; ye also ought to wash one another’s feet. For I have given you an example, that ye should do as I have done to you. Verily, verily, I say unto you, The servant is not greater than his lord; neither he that is sent greater than he that sent him. If ye know these things, happy are ye if ye do them.
— John 13:14-17

What humility! Wow! What a God is our God! Where do I sign up? How do I enlist? How do I join the kingdom of the transcendent God who is willing to wash my feet?