WHO: yourself
WHY WHO: because we are the only ones to know what we had, want and would like to have... and know the risks, dangers and renunciations that we need to face up...
WHY IS THE STRONGEST OF THEM ALL: knowing yourself is the most important battle in life and it will never end... because maybe you can give me suggestions to face the obstacles or reach my goals but you will never know what I am willing to sacrifice to achieve it