You defeat someone not because he is weak; you defeat someone when he wants to protect his weaknesses. Understand the difference. It is not your weaknesses that defeat you; it is your fondness towards your weaknesses, your protective attitude towards your weaknesses that defeats you.
If you are prepared to give up everything, if you are prepared to give up all your tender spots, your weaknesses, you would be very difficult to defeat. The final fulfillment, the final victory that we have been talking of, would then be yours.