"A friend to call is a friend to none." What's the meaning?

"A friend to call is a friend to none." What's the meaning? a friend to all is a friend to none a friend to all is a firend to none 这句谚语的意思：a friend to all is a friend to none what's the meaning of friend? The road to a friend’s house is never longThe road to a frie A friend to everydody is a friend to nobody. A friend to everybody is a friend to a friend to everybody is a friend to nobody this is a card （ ） my friend to me let's go to visit the hom 英语翻译The best way to have a friend is to be a friend. everyone wants to a true friend.but what is a true friend