We should never say sorry for giving someone a truth about themselves.

This helps them get closer to God.  Untruths distance us from a closer union with God. 

The word "sincere" comes from Latin meaning "without wax".  Wax used to be used to cover up defects in statuary.

Facing the truth about oneself - for instance, that one has repeatedly purloined the intellectual property of others and presented it as one's own - is a good thing.   

This person may have plagiarized for a number of reasons, but in the end, it is "wax" used to make one look better than one is. 

Words from today's Gospel  (from Saint John) from the Holy Mass come to mind: "He [Judas] said this... because he was a thief and held the money bag and used to steal the contributions."

What "contributions" have we taken from others as if they're our own, John?