Do good to both your own and to strangers as much as you can, and speak a kind word to both the good and the evil people. Ephrem the Syrian
Sometimes you have to get to know someone really well to realize you're really strangers. Mary Tyler Moore
Admiration and familiarity are strangers. George Sand
Eat and drink with your relatives; do business with strangers. Greek Proverb
Be straightforward in all your dealing and noble with strangers. Icelandic Proverb
Eat and drink with your relatives, but do business with strangers. Italian Proverb