You killed your first man at 13,
Killer instinct, Animal supreme,
By 16 you had learned to fight
The way of the warrior, you took it as your right.
Sunlight, falling on your steel,
Death in life is your ideal,
Life is like a wheel. [ Lyrics from: http://www.lyricsmode.com/lyrics/i/iron_maiden/sun_and_steel.html ]
Through earth and water, fire and wind,
You came at last-nothing was the end,
I'll make a cut by fire and stones,
Take you and your blade and break you both in two
Break you both in two.
Sunlight, falling on your steel,
Death in life is your ideal,
Life is like a wheel.
And it's rolling still.
The 5 chapters are earth, water, fire, wind, and lastly void ("nothing was the end"). One of the techniques described in the book of five rings is the fire and stones cut, which is a very severe cut to your opponent's blade and/or body.