The brain is continually developing and erasing neuronal connections, generating the thinking and behavior patterns we employ to make judgments, pick activities, and present ourselves to the outside world. Pathways that are used get stronger, whereas those that are not used weaken and are eventually replaced. The more you use a pathway, the more important it becomes and the faster it grows. Your current thinking and behavior patterns are a result of what has happened in your life up until now. These patterns were useful at some point and they are being reused now. If any problem arises which needs a different kind of response than usual, then new mental pathways will be created to deal with this issue. So basically, your current thinking and behavior are just the result of what's useful right now. The more you think about something, the more you learn about it. This is why teachers expect us to ask questions: so we can understand things better and build our knowledge base. Questions help us develop our brains! When you think about something positive, you encourage positive neurons to grow. When you think about something negative, you discourage negative neurons from growing. Actually, thinking about anything makes neurons grow regardless of whether they're positive or negative. But when you focus on something positive or negative, then you influence which neurons grow and which ones don't. Learning new things enhances your brain's ability to function.