1.children and fools speak the truth
– children and fools say things without knowing or thinking what they mean but often what they say is true

2.close, but no cigar
– you may be almost correct but you are still wrong

3.curiosity killed the cat
– asking questions or being curious about something that is not your business is often not a good thing

4.every cloud has a silver lining
– there is always something good in every problem or bad event

5.every dog has his day
– every person will have his chance or moment of glory