You are the system as long as the statement Is made with this thought in mind.... The way that you trade has to be based on real knowledge gained through study and Testing and preferably an understood cause and effect. Its all down to your ability to use sound Logic.
The problem I have Is when the 'the system is you' statement Is used to define some very vague 'feeling trading'.
I understand that a little amount of feeling/weighing up in your mind Is needed to trade some strategies. The difference Is If you have something solid to back your decision up or not.
Im no expert as I have never made any kind of income from trading, not yet. Everything writen above is my opinion.
Living the adventure in my head.