The best traders forget about a loss the minute they take it and move on. They are confident in their system and their ability to execute it. It is not about the money for these people. It is about finding a system that will bring them more profits than losses.
The best traders know how to take losses and not become depressed, angry, jealous, disgusted or defeated. They know how to take gains without gloating, boasting, or becoming euphoric. They see only the trade they are about to enter---not the trade that just ended or the one that might be coming in the future. All past trades are out of sight and out of mind. All future trades are an illusion.