Meaning of thought - no defeat is final, until you stop trying
this was just an example to make you understand.
It means that If you give up, it means you feel that you are defeated. and if you keep on trying.... then it means that you will reach your winning point. so if you quite, iits YOUR brain that is telling you that you aare defeated. but if you keep trying it means that you didnt give up yet as you know you are going to win.