It is unpredictable for you to know which of the strangers you are about to meet that becomes your friend. Be polite to every stranger!
Israelmore Ayivor, The Great Hand Book of Quotes
colleague, companion, comrade, courtesy, friend, friendship, good-friends, israelmore-ayivor, new-friends, polite, predict, relationship, stranger, strangers, talk, talk-politely, unpredictable