What is the theme of the horse and the loaded donkey

 That you get nothing from being selfish.

put the trash into the back of the truck and drive the truck to the back. then you must unload the truck.

based on the biblical principle proverbs 16: 32, i agree with the author of the passage "better is it that it takes longer to be angry than the strong " to the extent that i share the philosophy that the nobility of heart demonstrates the strength of a person. those who are very proud, get angry easily and show their anger toward others are really weak, but those who are noble and do not constantly obfuscate or contain their feelings of anger, are strong people