I thin that success comes only with failures in form of experience. Just like any other field, trading also requires the user to have sufficient experience. Even if you have a lot of knowledge about the strategies used by successful traders, experience is necessary. Otherwise, you will be risking a lot of money.
Experience is critical for example you can read books about performing magic tricks all what you want but if you do not begin practicing and performing for your friends you are never going to improve at all, trading is the same you can read all the books you want and while that is a good thing at some point you need to put your knowledge to test.