Robert Winston has made an excellent video explaining how people learn – from creation of a new idea through to mastery.
https://www.youtube.com/watch?v=t4np5wLAhWw
This video on neuroplacticity helps us to understand that neural pathways become strengthened or weakened depending on the frequency of the thoughts associated with the pathways.
The first class dojo video series on growth mindset concentrates on the power of yet and the idea of the brain being like a muscle.