The sentence says:
... if a man suffers those very things he inflicted on others, justice is vindicated.
- According to Lexico:
- 1.1 show or prove to be right, reasonable, or justified
- MW:
- 1.b-2 to provide justification or defense for: justify
Is this a common phrase as saying justice is vindicated? At first glance, I thought of "justice is justified", which seems a little bit redundant. People don't say "justify the justice", right? So is that better to translate it as "justice is defended" (according to MW)?