Losing is part of successfully trading. If you treat losing as part of trading then you are an experienced trader.
True lossing is part of successful trading every investments have to face the risk of loosing not all investment earned profit others is at loss thats why i keep on my mind that i should not put all the eggs in one basket because it is too risky and if that investment fails our investment will at loss
I agree with you, we can't success if we don't know our mistakes and failure and it comes in losing. All losing will be the lesson and right our mistakes, experience is a big key to success. And those experince encounter losing/good result. The mistakes is in the starting after that you can get lot of knowledge that will use in making a decision, decision that will gives a sweet fruit.