In the Book of Matthew Jesus speaks of being last, and of serving others.  Humility is of Christ. Christ himself came to serve, not be served.   Though He is the King of Kings He sacrificed Himself for the sake of others; even  death on a cross. In Matthew 20 verse 28  28) ”  Such  is the case with the Son Of Man who has come, not to be served by others, but to serve, to give his own life as a ransom for many.” Jesus, proves a point by choosing to ride an ‘ass’ rather than a Stallion. Jesus entire was lived out in parables.  Everything He did had meaning. It was done for a specific purpose.  In Matthew Chapter 21,  1-5   1)’As they drew near Jerusalem, entering  Bethphage on the Mount of Olives, Jesus sent off two disciples 2)with instructions: “Go into the village straight ahead of you and you will immediatley find an ass tethered and her colt with her. Untie then and lead them back to me. 3)If anyone says a word to you, say, ‘The Master needs them.’ Then he will let then go at once.” 4)This came about to fulfill what was said throught the prophet:

5)”Tell the daughter Zion, Your King comes to you without display astride an ass,astride a colt, the foal of a beast of burden.”