Our thoughts have a magnetic energy, and the thoughts we don't allow into consciousness will make an extra effort to be heard, drawing to us the external voices of the Inner Critic we would rather ignore. The Inner Critic comes into being when we stop listening to ourselves because we don't like what we're hearing. The difficulty with doing this is that negative beliefs are just as much our creations as positive ones. When we try to punish the badly-behaved ones by ignoring them they clamor all the more loudly for our attention. I have therefore adopted the practice of letting my inner critic speak.
Brushes are expensive.
Besides, that's a really frivolous idea. You have more important things to do. You have a business to run, classes to give, people to counsel. Play now, pay later. I now have a wealth of material with which to work.