If evolution is changes in a long period then revolution is changes in a short period, I think. Everything can change, including me. Actually, just one thing of me has changed. But, the thing changed a lot of thing of me. What is that thing? It's my perspective. My perspective of learning. I thought that I must learn what I want to know and don't learn anything else. That is my strong perspective. It makes me be more focused on what I want to learn.