In the 1990's Eric Kandel's discovery that the number of connections in a neural bundle can double with repeat stimulation won him a Nobel Prize. Kandel later discovered that if we don't use neural connections, they begin to shrink in just three weeks. This knowledge affords us the reshape our brain via the signals we pass through our neural network,. in other words through the thoughts we think and the emotions we 'practice '.
It seems that negative emotions may literally be an addiction to high levels of our own stress hormones, like cortisol and adrenaline. Both these stress hormones and relaxation hormones DHEA and oxytocin have set points, which explains why we feel uncomfortable in our skin when we think thoughts or feel emotions that drive our hormonal balance outside our comfort zone.
I find it helps to know even that feeling good ( if we are not used to it ) can push us out of our comfort zone.
It explains why we sometimes stop a practice that makes us feel better. If you understand what is happening and can Let Go and Allow the uncomfortable feelings to be there , even say YES to the discomfort, in a short while feeling good will become the new normal for you and stress and discomfort will be what takes you out of your comfort zone.
Practices that teach us to stay steady with discomfort such as, meditation , T'ai Chi and Sedona Method Enquiry all help us to rewire our brains in a more positive and liberating way.