Truth
Truth by definition excludes. (Apologist observation)
Tolerance seems to be the target to work toward today, and we are expected to allow everyone to have his or her own opinion without argument. That sounds reasonable until you realize that not everyone can be right while holding contrary ideas. When we all have the same facts but come to opposite conclusions, both cannot be true. Work to discover truth, not opinion.
Get the truth and never sell it. (Proverbs 23:23)
Jesus: “You are truly my disciples if you remain faithful to my teachings. And you will know the truth, and the truth will set you free.” (John 8:31-32)