Becoming a Mature Trader

In essence my goals as a trader are to (i) make money in bull markets, (ii) preserve capital in bear markets, and (iii) live a well-balanced life in all markets. Being able to achieve these goals requires maturity as a trader, which is an ongoing process. I have certainly learned a lot from others in this regard. Therefore, in this post I want to highlight a few quotes and insights that address the process of becoming a mature trader and help one answer the question: "How do I know if I have matured?"