It is because when you store food in your refrigerator and you don't use it for weeks and weeks, the food will eventually rot and have all sorts of bacteria in it.
Explanation: because they are making the food at this time and so when they do then they drop it, or if they mess it up they throw it away and start over.
Because you have the mindset if you think you can do it then you can, if you can't then you can't , because even those that did the impossible started but making their mindset believe they can