Authors:

If you know each other well, you want to do business with people you know well. You don't do business with strangers.

"Interview with Tun Dr Mahathir bin Mohamad". Interview with Dr Sue Onslow, commonwealth-oral-history-project.blogs.sas.ac.uk. May 12, 2014.
If you know each other well, you want to do business with people you know well. You don't do business with strangers.