You know, violence, I think, knocks on everyone's door.

- Juanes

I've had the school of hard knocks, and I've worked my way up to be the governor of this great state of Connecticut.

- William O'Neill

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

- Whoopi Goldberg

Every real thought on every real subject knocks the wind out of somebody or other.

- Oliver Wendell Holmes, Sr.

When life knocks you down, keep getting up.

- Malorie Blackman

Opportunity knocks, but doesn't always answer to its name.

- Mason Cooley

Opportunity knocks for every man, but you have to give a woman a ring.

- Mae West

Opportunity knocks only once. You never know if you'll get another opportunity.

- Leon Spinks

Fortune knocks but once, but misfortune has much more patience.

- Laurence J. Peter

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

- Bob Paisley

I don't think you can live as long as I have in rock n' roll and not take a few hard knocks.

- Joe Cocker

As my father would have said, I went through the college of hard knocks.

- Gloria Allred

I'm not doing contemporary songs unless something comes along that really knocks my socks off.

- Frankie Valli

I really appreciate an actor who has paid their dues and who has learned hard knocks and has been rewarded in the end.

- Enrico Colantoni

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

- Doug Larson

It ain't about if he knocks a guy out. It's about how he knocks a guy out. It's the style, the improvisation.

- Don King

Real beauty knocks you a little bit off kilter.

- David Byrne