When you're chewing on life's gristle, don't grumble, give a whistle and this'll help things turn out for the best.

— (Eric Idle)

11 seconds sound clip from the Life of Brian movie soundboard.

You can hear this line at 01:29:41.740 in the Blu-ray version of the movie.

Quote context

[...]

- So there you are! I might have known it would end up like this. To think of all the love and affection I've wasted on you.

- Well, if that's how you treat your poor old mother in the autumn years of her life, all I can say is, go ahead, be crucified! See if I care. I might have known...

- Mum! Mum!

- I don't know what the world's coming to.

- Cheer up, Brian. You know what they say. 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, always look on the light side of life.

- 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, always look on the light side of life. (2)

[...]