Mormon taught, “See that ye do not judge wrongfully, for with that same judgment which ye judge, ye shall also be judged” (Moroni 7:18). This language is clearly adapted from Christ’s Sermon at the Temple in 3 Nephi 14:1–2: “Judge not, that ye be not judged. For with what judgment ye judge, ye shall be judged.” As Mormon has, by this point, made abundantly clear, his message isn’t concerned with making final judgments about other individuals—as we might think of “judging” others today in a negative way. Instead, the judgment to which he refers has more to do with generally discerning between good and evil in a variety of settings or applications. Our judgments must be informed and guided by the divine light or Spirit of Christ. When seen in the broader context of judging between good and evil, it is actually imperative that we do and must make judgments. As Mormon declared in verse 15: “it is given unto you to judge.” Judge we must, but we do so at our peril, if we do not learn to judge righteously using the light of Christ.
Dallin H. Oaks, “‘Judge Not’ and Judging,” Ensign, August 1999, online at archive.bookofmormoncentral.org.