Jack of all trades, master of none.
Just when you think you've finally hit bottom, someone tosses you a shovel.
Keep something for a rainy day.
Keep your eye on the ball and your head in the game.
Keep your mouth shut and your eyes open.
Keep your weather-eye open.
Kill not the goose that lays the golden egg.
Kind words are worth much and they cost little.
Kings have many ears and eyes.
Knowledge is the mother of all virtue; all vice proceeds from ignorance.
Knowledge, humbles a great person, astonishes the common, and puffs up the small.
Laugh and grow fat.
Laugh before breakfast, you'll cry before supper.
Law cannot persuade when it cannot punish.
Lawyers and painters can soon make what's black, white.
Lawyers and woodpeckers have long bills.
Least said soonest mended.
Leave well alone.
Let bygones be bygones.
Let not turn fun to mischief.
Let the cobbler stick to his last.
