Those two words, “judge not,” can threaten to stop a dialogue.
But two more words can restart it: “keep reading.”
The “judge not” in Matthew 7:1 is not the end of the chapter.
By the third verse Jesus has pointed out that we should indeed be judging our own spiritual state:
“And why beholdest thou the mote that is in thy brother’s eye, but considerest not the beam that is in thine own eye?”
By the fifth verse Jesus commands that a hypocrite ought to take the beam out of his own eye:
“And then shalt thou see clearly to cast out the mote out of thy brother’s eye.”