Treat your friend as if he might become an enemy.

This sentence which was written Publilius Syrus.

Jean Dixon said that

Those who are in the limelight always risk drawing unwanted attention. No matter where you are, be discreet.

I'm willing to do that whoever i meet.

I heard one story about this situation when I lived in Canada.

Now i'd like to tell you what i heard.

Mortals who were really rud to friend no matter what he has solved their quite personal problems, however, they've never contacted with him after that.

I think that "It's a really fatal error."