"Some things in life are bad
They can really make you mad
Other things just make you swear and curse
When you're chewing on life's gristle
Don't grumble, give a whistle
And this'll help things turn out for the best...
And...

...always look on the bright side
of life...
(Whistle)

Always look on the light side
of life...
(Whistle)

If life seems jolly rotten
There's something you've forgotten
And that's to laugh and smile and dance and sing
When you're feeling in the dumps
Don't be silly chumps
Just purse your lips and whistle
- that's the thing.
And...always look on the bright
side of life...
(Whistle)"
~Monty Python's Life of Brian (and Spamalot)

I'm not giving this song justice by simply posting the lyrics. You can listen to it here: https://m.youtube.com/watch?v=SJUhlRoBL8M

But I urge you to be prepared for extreme weirdness because it's Monty Python.

~Paint_splatt