It is true that a coward does die a million deaths. They may not die physically but they do on the inside. Every time someone runs away from something a little bit of them dies each time. A battle is lost when he turns away from a challenge and everything that they stand for as an 'honourable' person dies.
However, one who is valiant faces every battle and the only one he will lose is the one where he dies with by fulfilling everything in life rather than backing down.
Thank you for sharing such a beautiful quote with us @davidp