Keep company with the wise and you will become wise. If you make friends with stupid people, you will be ruined.
［注解］语出《圣经·箴言》第13章第20节。
［译］与智慧者同行，必得智慧；和愚昧人做伴，必受亏损。
Keep good men company, and you shall be of the number.
［注解］company意指做伴，同行。同义的表达有：Who keeps company with the wolves, will learn to howl. 与狼结交，必学狼嗥。
［译］与好人做伴，必定学好样；近朱者赤。
Keeping a good name is reward not only by outsider's esteem but when those who know you best put their confidence in you.
［译］维护名誉不仅能受到外人的尊敬，而且还能让那些最了解你的人信得过你。
Kind words are the music of the world.
［译］善言是世上的音乐。
Kindness always begets kindness.
［译］善有善果。
Kindness cannot be bought for gear ( = goods)
［注解］意指好心不能靠金钱而只能通过相互帮助得到。
［译］金钱买不到仁慈。
Kindness is the golden chain by which society is bound together.
［译］善良是连结社会的金链。
Kindness is the language that the deaf can hear and the dumb understand.
［译］善良为语言，聋子能听见，哑巴懂心间。
Kindness is the sunshine of social life.
［译］仁慈是社会生活中的阳光。
Kindness, like grain, increases by sowing.
［译］善意，就像谷物，在播种中生长。
Kindness will creep where it may not go.
［译］仁慈可进入任何禁地。
Knavery may serve for a turn, but honesty is best at long run.
［注解］a turn指“一个回合”。at long run“长期运转”。
［译］欺诈可能一时得逞，但诚实却永远是上策。
Know thyself.
［注解］thyself指yourself，“自己”。这是古希腊阿波罗神庙中告诫世人的一条神谕。意指人应该了解自己的才智能力、能胜任的工作及自己的性格爱好等，并能按照自身的这些特点去发展自己。如能不折不扣遵照此古谚去做，人就会心悦诚服地克服自己的私心，放弃一切不应有的权利和要求。
［译］人应认识自己；人贵有自知之明。
Know your own faults before blaming others for theirs.
［译］责人之前先责己。