English idioms offer advice about how to live and also transfer some underlying ideas, principles and values.
It's rainning cats and dogs
A wolf in sheep’s clothing
Mutton dressed (up) as lamb
Like a fish out of water 
With flying colours
To be kept in the dark
Once in a blue moon
Out of the blue
To know a place like the back of your hand 
To have butterflies in the stomach 
Find your feet
Joined at the hip
It's not my cup of tea
A hard nut to crack
It's not use crying over spilt milk
As red as a beetroot