If you are in a mental state of sadness and demotivation, then read this: some specific Neurons, specifically responsible for these sad / demotivated thoughts of you are firing and they basically run in a circle. You need to actively connect a new Neuron to them, which lets you escape this circle and which makes you question your current mental state. Then you might realise, that your brain just trapped itself in this specific Neuron-cycle and you can leave again.