"You call Me Teacher and Lord; and you are right, for so I am. If I then, the Lord and the Teacher, washed your feet, you also ought to wash one another's feet. For I gave you an example that you also should do as I did to you. Truly, truly, I say to you, a slave is not greater than his master, nor is one who is sent greater than the one who sent him. If you know these things, you are blessed if you do them," (John 13:13--17).
* As important as is understanding truth, applying it is even more crucial. The many lessons the disciples learned were not to remain academic exercises--- they were to be acted upon. Too often we are like spiritual sponges --- soaking up biblical teaching after teaching... and never being 'wrung out.'
* Knowing isn't growing unless there's obedience. The example and instruction of humility set forth by the Lord Jesus were not for the disciples' information, but for their application.
Unless we act on what we know, we stagnate.