Construct a sentence using the phrase "an eye for an eye".
Some people believe in the principle of "an eye for an eye" when it comes to seeking justice for wrongdoing.
Complete the following task based on the instruction and optional input provided.### Instruction:
Construct a sentence using the phrase "an eye for an eye".

### Output:
Some people believe in the principle of "an eye for an eye" when it comes to seeking justice for wrongdoing.