see the dark side of the moon

ask for the moon

To claim or desire something that one cannot have.

blue moon

A long time.

bright side

A consoling aspect of a difficult situation.

dark cloud

A situation or future event that causes worry, problems or unhappiness, likened to such a cloud overhead in the sky.

dark horse

Someone who possesses talents or favorable characteristics that are not known or expected by others.

err on the side of

To behave in a manner which favours or which is biased toward.

err on the side of caution

To act in the least risky manner in a situation in which one is uncertain about the consequences.

for all the world to see

in plain view; clearly visible