What is the meaning of [Don’t make a mountain out of a molehill]

Don’t make a fuss about nothing. Don’t turn a trifling matter into a major
disaster.

> ‘You’ve absolutely ruined my new dress by spilling that soup over it.’

> ‘It’s only a tiny stain, which can soon be got out. For heaven’s sake don’t
make a mountain out of a molehill!’

##### See also:

* Take not a musket to kill a butterfly