That's the best investment advice anyone can give; and unfortunately it seems to be the hardest-earned advice. When I first became interested in investing, I was ruled by my emotions—I paid the consequences for that mistake.
Objectivity, maturity, and self-control are essential traits for every good investor.
Those three elements are crucial, some of us learn it the worst way, but the past is a good teacher, the important thing is to learn from those mistakes. I wish you the best of luck and thanks for your feedback.