We may not judge motives, intentions, and guilt before God but we are commanded by Christ Himself to judge actions, speech, writing against truth and in this way we can help others by offering truth.
The rule from Christ is:
“Judge not that you be not judged.” (Mt 7:1)
“Stop judging by appearances, but judge justly.” (Jn 7:24).
“Beware of false prophets, who come to you in sheep’s clothing, but underneath are ravenous wolves. By their fruits you will know them” (Mt 7:15, 16).
“Every tree that does not bear good fruit will be cut down and thrown into the fire. So by their fruits you will know them.” (Mt 7:19-20).
St Paul adds:
“Test everything: retain what is good.” (1Thess 5:21).
“The spiritual person, however, can judge everything but is not subject to judgement by anyone.” (1 Cor 2:15).
“I, for my part, although absent in body but present in spirit, have already, as if present, pronounced judgement on the one who has committed this deed…” (1 Cor 5:3; read 1-13).
“I am speaking as to sensible people; judge for yourselves what I am saying.” (1 Cor 10:15).
“Beloved, do not trust every spirit but test the spirits to see whether they belong to God, because many false prophets have gone out into the world.” (1 Jn 4:1).
“I know your works; I know that you are neither cold nor hot. I wish you were either cold or hot. So, because you are lukewarm, neither cold nor hot, I will vomit you out of my mouth.” (Rev 3:16).
We may not judge motives, intentions, and guilt before God but are commanded to judge actions, speech, writing against truth and in this way we can help others by offering truth.