The purpose of life is overcoming? Overcoming gravity, circumstances, challenges, and obstacles? 
Interesting challenges, un interesting challenges? 
The thinking, man, the walking man? It does seem that with novel environments, breed stimulus to new thoughts? 
The zest to fight in battle
Rush with greater force
Trusting their courage and will to fight
Match murderous mayhem
The earth that feeds us all
As long as I have strength I never stop
Terrible grief
Lept with a war cry
What if, there were indeed some sort of pre-ordained path to life?