If you walk through a field, then it makes sense to follow the worn path. It’s an easier route to go.
Unless the worn path goes all round the field. Then it might make more sense to cut a new path straight through the middle.
At first that new path will be hard going, but pretty soon it will get easier.
When others notice the new path, they will probably use it too. More footfall means it gets worn down quicker.
As the other path gets less used, it will grow over until eventually it will not exist at all.
This is like your brain as you change.
Each time you do something new you create a new path – a neural pathway.
Each time you travel that neural pathway by doing the new thing you reinforce it.
Old pathways disappear as you stop using them.
Seeking that new pathway and thinking about that new pathway makes it stronger quicker.
Pretty soon the old way of thinking and behaving is a long forgotten path.
This is Neuroplasticity. This is what every client I work with goes through. Permanent changes in the brain.