John 13:1 Now before the Feast of the Passover, when Jesus knew that His hour had come that He should depart from this world to the Father, having loved His own who were in the world, He loved them to the end.
These are His most important teachings for they are His final instructions to His disciples. (With His help, we will try to understand His teachings in John 13-16). Then, we can use them to check our own spiritual conditions.
Philippians 2:5-8 Let this mind be in you which was also in Christ Jesus, who, being in the form of God, did not consider it robbery to be equal with God, but made Himself of no reputation, taking the form of a bondservant, and coming in the likeness of men. And being found in appearance as a man, He humbled Himself and became obedient to the point of death, even the death of the cross.
Jesus, the Almighty God, Creator of heaven and earth humbled Himself by coming down to become a slave and born in the staple among the animals.
John 13:5-7 After that, He poured water into a basin and began to wash the disciples’ feet, and to wipe them with the towel with which He was girded. Then He came to Simon Peter. And Peter said to Him, “Lord, are You washing my feet?” Jesus answered and said to him, “What I am doing you do not understand now, but you will know after this.”
He demonstrated His servant hood again by washing His disciples' feet. Before anything else, can we lower ourselves (washing another's feet) to serve others. Brethren, bring yourselves down to the level of your friends, staffs, employees, sheep, poor brethren, children, etc. and enjoy their fellowships and you will be surprised how God will bless you with His peace, joy, comfort, etc.
Once we have crucified our old man (by our humility), our spiritual man will be able to manifest His gifts, empowering and anointing so that His Name is always glorified.
John 13:13-15,17 You call Me Teacher and Lord, and you say well, for so I am. If I then, your Lord and Teacher, have washed your feet, you also ought to wash one another’s feet. For I have given you an example, that you should do as I have done to you... If you know these things, blessed are you if you do them.
Mat 20:26-28 Yet it shall not be so among you; but whoever desires to become great among you, let him be your servant. And whoever desires to be first among you, let him be your slave— just as the Son of Man did not come to be served, but to serve, and to give His life a ransom for many.”