Proverbs starting with O

1: Oaks may fall when reeds stand the storm.
said to mean that:

2: Of two evils choose the least.
advices that:

3: Oil and water do not mix
used to say :

4: Old birds are not caught with chaff.
used to say that:

5: Old friends and old wine are best.
used to say that:

6: Once bitten, twice shy.
said when :

7: One beats the bush, and another catches the bird.
said for :

8: One chick keeps a hen busy.
similarly :

9: One day honey, one day onion
describes :

10: One drop of poison infects the whole tun of wine.
used to say that:

11: One fire drives out another.
suggests that:

12: One good turn deserves another.
said to mean that:

13: One law for the rich, and another for the poor.
suggests that:

14: One lie makes many.
said to mean that:

15: One link broken, the whole chain is broken.
signifies that:

16: One man, no man.
expression meaning that :

17: One man’s meat is another man’s poison.
means that:

18: One of these days is none of these days.
used to mean that:

19: One scabby sheep will mar a whole flock.

20: One swallow does not make a summer.
states that:

21: One today is worth two tomorrows.
means that:

22: One's bark is worse than his bite
said for :

23: Only real friends will tell you when your face is dirty.
meaning that:

24: Opportunity makes the thief.
implies that:

25: Opportunity seldom knocks twice.
said to mean that:

26: Out of sight, out of mind.
states that:

27: Out of the frying-pan into the fire.