The psychology of successful trading can be broken down to a 2-step process.
Attachment to a well backtested trading plan - It’s just amazing how we falter when asked to do n-steps repeatedly day in and out. Among all that life throws at us if we can train our mind to follow a set plan, great windows of profitability tend to open out.
Detachment from the outcome - Focus on money and we submit ourselves to be guided by greed and fear. Only when the heart looses the craving for money is it fully ready to follow a plan and behold great outcomes.
Objective persistence is way better than subjective indulgence in the market.