Found 1,329 quotes starting with O:

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Opportunity does not knock, it presents itself when you beat down the door.
– Kyle Chandler
Opportunity doesn't knock. You knock, opportunity answers.
– American Proverb
Opportunity is missed by most people because it is dressed in overalls and looks like work.
– Thomas Alva Edison
Opportunity is often difficult to recognize we usually expect it to beckon us with beepers and billboards.
– William Arthur Ward
Opportunity knocked. My doorman threw him out.
– Adrienne Gusoff
Opportunity knocks at the strangest times, It's not the time that matters But how you answer the door.
– Steve Gray
Opportunity may knock only once, but temptation leans on the doorbell.
– Anonymous
Opportunity rarely knocks on your door. Knock rather on opportunity's door if you ardently wish to enter.
– B. C. Forbes
Opposites are cures for opposites.
– Hippocrates c. 460-400 BC, Breaths, bk. I
Opposition brings concord. Out of discord comes the fairest harmony.
– Heraclitus
Opposition is true friendship.
– William Blake
Oppression can only survive through silence.
– Carmen de Monteflores
Oppression that is clearly inexorable and invincible does not give rise to revolt but to submission.
– Simone Weil
Optimism is a kind of heart stimulant--the digitalis of failure.
– Elbert Hubbard
Optimism is essential to achievement and it is also the foundation of courage and true progress.
– Lloyd Alexander
Optimism is the content of small men in high places.
– F. Scott Fitzgerald
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
– Helen Keller
Optimists are childish; they even believe they can find an ice cream store in the hell!
– Mehmet Murat ildan
Optimization hinders evolution.
– Anonymous
Order and simplification are the first steps towards the mastery of a subject.
– Thomas Mann
Order is not pressure which is imposed on society from without, but an equilibrium which is set up from within.
– Jose Ortega y Gasset
Order is the sanity of the mind, the health of the body, the peace of the city, the security of the state. Like beams in a house or bones to a body, so is order to all things.
– Robert Southey
Order is the shape upon which beauty depends.
– Pearl Buck
Order, unity and continuity are human inventions just as truly as catalogues and encyclopedias.
– Bertrand Russell
Ordinarily he was insane, but he had lucid moments when he was merely stupid.
– Heinrich Heine

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