Opportunity knocks only once.

Certain formats should never be forgotten, 'Blind Date' for instance, because 'Britain's Got Talent' is really 'New Faces' or 'The Gong Show,' whilst we're…

— Nigel Lythgoe

If you want to be an actor, you should just get out there and do it. I don't go for the approach of first…

— Bill Nunn

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

— Mason Cooley

Opportunity only knocks once

— Proverb

The opportunity knocks only once and does not wake up those that are asleep.

— Vikrant Parsai

Opportunity only knocks so many times.

— Jill Ellis

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

— Leon Spinks

Opportunity never knocks; it is within you.

— Denis Waitley

If you never heard opportunity knock, maybe you're never at home.

— Marilyn vos Savant

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

— Doug Larson

Opportunity knocks at any time in life and everybody should answer that door when it does. Go for it!

— Amanda Redman

I don't think there's anything good that comes out of 'Hard Knocks,' but we'll see.

— John Dorsey

You've got to think life can give you some bad knocks; no matter how hard you're knocked, you've got to get up.

— Eddie the Eagle

“I am the imagination of myself. I am the one who watches. Not to be confused with the one who knocks.”

— Dana Gore

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

— Bob Paisley