There is a concept in physics involving subatomic particles, which are so minute in size that when a light photon hits them, they get scattered. This makes it impossible to actually see one when you try to observe it. But you know that the particle is there. And that, in a nutshell, is what "achhe din" is all about.

Similarly, there are these vendors in UP's state transport buses who sell certain juicers made of plastic. They cost '10, and the vendor demonstrates how a single orange yields five cups of juice thanks to that contraption. Impressed, you purchase one and take it back home, only to find that all you get is half a cup of juice. That's the same "juicer" that the nation bought during the 2014 election. And now, there's a chance that we'll buy it a second time in two months, because our attitude is such that we don't feel that the problem lies with the juicer. We feel that the problem lies with us.