An expanded version of this slogan: "Throw your blue glasses away, put on pink ones instead!"
It's all about your mindset, in other words, the glasses you're wearing and looking at the world through. If you wear blue glasses everything looks gloomy and tragic. Changing the mindset, or glassess, is quite easy however. Put pink glasses on and you'll fill your heart and mind with joy and optimism:-) Positive thinking does work!