A: I heard Susan used some bad means to get a promotion despite many objections against it.

    B: For her, the end justifies the means.

    Note: The idiom means that as long as people get the results they are after, then how they get the results does not matter.

    In this expression, “end” means “a result” and “means” refers to the method used to achieve the result. To justify is to prove that the method is “just” or right.

    Literally, it is to say that if the end result is good, then all is good. It suggests that in order to achieve an important aim, it may be acceptable to even do something bad or immoral.