Someone knocks at the door of an apartment to borrow salt or sugar, people run into each other in the elevator, and in this way become inscribed in the spectator's memory.
Krzysztof Kieslowski

Sometimes opportunity knocks, but most of the time it sneaks up and then quietly steals away.
Doug Larson

The only truly anonymous donor is the guy who knocks up your daughter.
Lenny Bruce

The physio side probably stemmed from the knocks I got as a player.
Bob Paisley

The truth knocks on the door and you say, go away, I'm looking for the truth, and it goes away. Puzzling.
Robert M. Pirsig

Too often, the opportunity knocks, but by the time you push back the chain, push back the bolt, unhook the two locks and shut off the burglar alarm, it's too late.
Rita Coolidge

When a guy knocks ya down, never get up unless he's gonna kill ya.
Gennaro Angiulo

When I listen to these women, it makes what I thought were my hard knocks feel like little nudges.
Whoopi Goldberg

When life knocks you down, try to land on your back. Because if you can look up, you can get up. Let your reason get you back up.
Les Brown

When life knocks you to your knees, and it will, why, get up! If it knocks you to your knees again, as it will, well, isn't that the best position from which to pray?
Ethel Barrymore

When suffering knocks at your door and you say there is no seat for him, he tells you not to worry because he has brought his own stool.
Chinua Achebe

You learn the most from life's hardest knocks.
Conway Twitty