The old saying of “It takes more muscles to smile than it does to frown”, may be a bit weak on scientific evidence, but I like to draw a parallel thought from this idea.
It seems to be easier to focus on the negative aspects of situations rather than appreciating the positives.
As a general rule of lifestyle, I think it is really important to highlight and emulate positivity. However, just like a muscle, it needs to be exercised and worked.
If you want to be a grump, it’s not hard. If you want to be a positive person that influences others, look to the silver linings and minimize focus on things that are negative.