Why did the cracked pot apologise to the water-bearer?

Answer:

It could not accomplish its main duty.
Discussion:
“I have been able, for these past two years, to deliver only half my load because this crack in my side causes water to leak out all the way back to your master’s house. Because of my flaws, you have to do all of this work and you don’t get full value from your efforts,” the pot said.
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