'Difference' in the Bible

They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.

There is also a difference between a wife and a virgin. The unmarried woman cares about the things of the Lord, that she may be holy both in body and in spirit. But she who is married cares about the things of the world -- how she may please her husband.

But from those who were reputed to be important (whatever they were, it makes no difference to me; God doesn't show partiality to man) -- they, I say, who were respected imparted nothing to me,