text: The quote first appears in Ezekiel 3:18-20 and in the New Testament where God tells Ezekiel that if He tells him something and Ezekiel does not warn the sinner, both will suffer his judgment and then in Matthew 18:15 where we learn that if we find our brother transgresses we should first speak to him one on one.  The trinity is One. Christ is not contradicting the Father in Ezekiel but rather is talking about how to go about correction.  We also have the story of Cain and Able and Cain asking if he is his brother's keeper. (yes) And the parable of the wealthy man and Lazarus where we see a version of this principal when Lazarus was in heaven but the rich man was not because, although he did Lazarus no harm, he did not assist him.  There are many examples - like Christ's condemnations of the Scribes and Pharisees based on their failure to do God's will rather than their own.  Christ warns of the judgment to come in all these examples for not speaking up in truth to those in sin.