Right thoughts, constantly poured into our consciousness, will eventually purify it. We could liken it to Synaptic Pruning. Our brains are full of neurons that are wired together and these connections get stronger or weaker based on our experiences. So what we focus on grows. If we focus on negativity our brain rewires itself and those things grow. When we focus on Positivity Truth goodness joy laughter happiness The brain rewires itself along those lines and that grows and becomes our experiences