“With the strongest emphasis (truly, truly) I tell you, a slave is not greater than his Lord, nor is one who is sent (Gk. ‘an apostle', one who is sent) greater than the one who sent him. If you know these things you are blessed if you do them.”
This statement is so patently true that it cannot be denied. He was saying, ‘as I am greater than you and have done this, so you too must be ready to behave in the same way'. The trouble is that the Lord and the Sender were so deeply humble and so ready to serve that it makes it difficult for us arrogant humans to follow suit. We are so the opposite of being humble. We are good at putting on an act at the right time when we feel it necessary, but we find it difficult to do it all the time, especially when it is out of the limelight. It is one thing to know these things. It is another to do them. But blessing only follows if we do them.