If opportunity doesn't knock, build a door.
— Milton Berle

There’s nothing wrong with getting knocked down, as long as u get right back up.
Muhammad Ali knock quote

Knock quotes
Picture quote about Knock

Clear conscience never fears midnight knocking.
— Chinese Proverbs

Opportunity may knock only once, but temptation leans on the doorbell.
— Anonymous

So I say to you, Ask and it will be given to you; search, and you will find; knock, and the door will be opened for you.
— knock quotation by Jesus Christ