"اگر آسیبی به کسی وارد شود باید چنان شدید باشد که نیازی به ترسیدن از انتقام او نباشد"

Simplified Meaning:

If you must harm someone, make sure the harm is so strong that they cannot retaliate. Think of it like this: If you leave an enemy only slightly hurt, they might come back stronger and more determined to get back at you. Imagine a king who must deal with a rebellious noble. If the king only gives a mild punishment, the noble might gather forces and try to overthrow him later. But if the king gives a punishment so severe, like banishing the noble far away or taking away all his power, the noble won't be able to fight back. So, if you find yourself in a situation where you need to take a strong action against someone, make sure it is definitive so they won’t pose a threat to you in the future. This advice can be applied carefully in some aspects of life but generally advocates for strong, decisive actions in critical situations where lingering threats could cause more harm.