Who said "One must require from each what each can perform."?

This quote is attributed to The King.

One must require from each what each can perform. - The King

"One must require from each what each can perform."

The King Justice

Character in The Little Prince

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"It is a matter of discipline"

"I am who I am and I do what I do."

"One must demand that a king be dignified."

"It is a lonely thing to be a king."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."