論語。季氏篇

孔子曰："益者三友，損者三友。友直，友諒，友多聞，益矣。友便辟，友善柔，友便佞，損矣。"

孔子說："益友有三种，損友有三种。同正直的人，信實的人，見聞廣博的人交友，便有益了。同諂媚奉承的人，當面恭維而背面毀謗的人，誇誇其談的人交友，便有害了。"

Confucius said,"three kinds of good friends and three kinds of bad friends. Make friend with the person who is upright, faithfulness, and full of knowledge then gain benefit. Make friend with the person who is flattery, respect in front but slander at back, boastful then is harmful."

現在已很少聽人說分辨益友和損友的。只要有一面之緣，就可以是朋友了。更多時候人都喜歡聽"好的話"，或誤信別人"吹牛的話"，如果不帶眼識人就很愚蠢了。如果還推心致腹就很危險了。

I rarely hear people saying to differentiate a good friend or bad friend. As long as we met before then we are friend. Lots of people like to hear "sweet and nice word", believe the con-man lying and boasting. This is stupid if you cannot differentiate them, this is dangerous if you treat them as best friend.
Sent from my BlackBerry® Smartphone