It means those who spend all their time
seeking violence and trying to kill others
are destined to find the violence they seek
and die instead. It is meant as a warning
to not seek
fights, but to try to find peaceful resolutions to problems
if at all possible (a sentiment that is too often forgotten
and sorely needed in this world).
You hear about Blake? He thought he was all that and went to front with
in the barro. Even with
his piece, he ended up fufilling the old saying, live by the sword, die by the sword.