Q. 1. What is the Catholic interpretation regarding the Bible words "An eye for an eye?"
A. 1. The words "an eye for an eye" are found in the Old Testament. [Ex. 21:24; Lev. 24:20; Deut. 19:21]
"An eye for an eye", known as the law of retaliation, does not mean that if someone did you wrong, you can also do some kind of wrong to that person. It has a deeper meaning than that. It means that if someone did you wrong, the justice that must be done to that person must be fair, neither excessively harsh, nor excessively lenient.
In other words, if someone steals from you, that does not justify cutting off his hand. Instead, he must repay what he stole in its full value.