Losses are not a failure, but an investment in experience. Most people give up because they can’t separate emotions from the learning process. But it’s those who stay in the game and see every loss as a step forward who eventually become the very "masters" you’re talking about
People who have become experts in a particular field are people who are used to doing it at all times such as in trading, so failure in trading is not an end to stop completely. Because people who can win are people who never stop fighting so that every failure can make a trader mentally stronger and also more professional in determining the next steps when trading again in the future. So giving up is not an option that must be thought of after failure, but from that failure every trader must be more open to thinking so that in the future there will be no more failures that happen to him.