Questions:
Q1) In the last line,what did the writer mean by suggesting that "he may have found more porcupines than rats?"
Q2) What's worth giving up your life for?

Answers:
Q1) The writer mean that he have knew there are more as brave as a porcupine scaring the aggressors than as coward as a rat hearing at the sound of footsteps running away.
Q2) I will give up my life for my closed ones including my friends.I will protect my family first.If no one will protect them,who will?To keep our relationships long lasting,protect them without letting them getting hurt