When you're smilin, when you're smilin
The whole world smiles with you
When you're laughin, oh when you're laughin
The Sun comes shinin through
But when you're crying, you bring on the rain
So stop that sighin, be happy again
Keep on smilin, cause when you're smilin
The whole world smiles with you
These lyrics are so true. Whenever you send positivity out into the world - joy, gratitude, kindness, cheerfulness, smiles, enthusiasm, enjoyment - it will always return to you in the form of positive experiences, people, conditions, ect. Of course, the same goes for negativity too. The world always reflects our emotions.
Anything that anyone gives attention to, becomes true