The more you practice and the more quality time you put into your practice, the more that your brain pathways change.

What you learn changes the neural associations in your brain.  What is in those neural pathways or associations becomes permanent.  

Without repetition, neural pathways and associations cannot change. 

Reference: https://socialanxietyinstitute.org/social-anxiety-chemical-imbalances-brain-neural-pathways

http://www.edutopia.org/blog/accelerating-students-neural-superhighway...