"How could you do this?" Pride hissed. "You betray Father not once, but twice, after he gave you everything?"
The box stopped moving. Greed must have halted. "I really hope you're not serious."
"Of course I'm serious! You're only alive because of Father! You owe him all you have and all you are! How could you turn your back on him after all he's done for you?"
There was silence and for a moment, Pride thought his words had reached the other homunculus. Laughter dashed those hopes.
"All he's done for me…" Greed chuckled. "Why was I created, Pride? Why were you created?"
"To help Father!"
"Exactly. Dear old Dad didn't make us out of the goodness of his heart. It was just another part of the plan, a milestone on the way to becoming a perfect being. At best, we were tools; at worst, we were trash that he was getting rid of" Greed scoffed. "My life didn't start until I left you guys and built my own destiny, my own purposes. My own family. Father gave me nothing; everything I have that's worth having, I found for myself."
"…You are the most ungrateful slime to ever walk this earth." Pride hissed.
"Maybe. I am Greed, after all; greedy people aren't known for their gratitude." He patted the indestructible box that was Pride's prison. "Tell you what, you use your new free time to make a speech about what a terrible son I am. Maybe you'll convince me of the error of my ways. I'll visit you in, oh, 100 years or so to listen to it."
Pride's angry screech was music to his ears.