Judge not?
Jesus said in Matthew 7:1, "Judge not, that ye be not judged." But then Paul in 1 Corinthians 5:3, "For I verily, as absent in body, but present in spirit, have judged already, as though I were present, concerning him that hath so done this deed,"
This seems like a contradiction, which means there is probably a subtle difference, and thus needs a study.
The word used by Paul in Greek is κρίνω (G2919). This is the exact same word as used by Jesus.
Looking through the usages of the word, we find the following verses: