Back in Fate, Rin and Shirou were talking about seals. Shirou, being the usual Shirou, asked whether it was useful, and Rin went berserk on him and mentioned that of course it was; like getting a great car, but nobody how much a car can do, it can't reach the moon.

Or something like that.

What does that really sound like?

A rat wheel

Like the one over here: http://www.urc.ac.ru/LuckyGarage/gail/wheel.gif

With a prize that the rat wants to eat but just can't reach no matter how fast he goes.

Break that up into many rats on the same wheel, a lot running the other way, and another group running the other way; different variations and layers of cheese and a grand cheese lurking in the background, and you get a basic possible representation of...