Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you. (Matthew 7:1-2, italics mine)
But now I am writing to you that you must not associate with anyone who claims to be a brother or sister but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people. What business is it of mine to judge those outside the church? Are you not to judge those inside? God will judge those outside. “Expel the wicked person from among you.” (1 Corinthians 5:11-13, italics mine)
Confused yet? I certainly have been. How can I reconcile verses that seemingly contradict one another?